first commit
This commit is contained in:
commit
1f5b8f6c8c
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#define SERVER_ADDRESS 0x01
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#define RH_SPEED 2000
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#define RH_RX_PIN 11
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#define RH_BUF_LEN 5
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uint8_t rh_buf[RH_BUF_LEN];
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#define RH_ASK_MAX_MESSAGE_LEN RH_BUF_LEN
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#include <RHDatagram.h>
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#include <RH_ASK.h>
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RH_ASK driver(RH_SPEED, RH_RX_PIN);
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float t = 0;
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float h = 0;
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uint8_t bat_percent = 0;
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uint8_t bat_raw = 0;
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#define MSG_START 0x00
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#define MSG_TEMP 0x01
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#define MSG_HUMID 0x02
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#define MSG_ERR 0xee
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void setup() {
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Serial.begin(9600);
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if (!driver.init()) {
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Serial.println("init failed");
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} else {
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Serial.println("init done");
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}
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}
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void loop() {
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uint8_t len = sizeof(rh_buf);
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if (driver.recv(rh_buf, &len)) {
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Serial.println("got message: ");
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switch (rh_buf[0]) {
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case MSG_START:
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// start message
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Serial.println("0x00 start byte");
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break;
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case MSG_TEMP:
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// DHT data
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Serial.println("0x01 DHT data");
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memcpy(&t, &rh_buf[1], 4);
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Serial.print(t);
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Serial.print("°C - ");
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break;
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case MSG_HUMID:
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// battery data
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Serial.println("0x02 DHT Humidity");
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memcpy(&t, &rh_buf[1], 4);
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Serial.print(t);
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Serial.print("%");
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break;
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case MSG_ERR:
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// error
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Serial.println("0xEE error");
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break;
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default:
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// should never happen
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break;
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}
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}
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}
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@ -0,0 +1,149 @@
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/* Fast DHT Lirary
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*
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* Copyright (C) 2015 Sergey Denisov.
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* Written by Sergey Denisov aka LittleBuster (DenisovS21@gmail.com)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version 3
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* of the Licence, or (at your option) any later version.
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*
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* Original library written by Adafruit Industries. MIT license.
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*
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* https://github.com/LittleBuster/avr-dht22
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*/
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#include "dht22.h"
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#define DHT_COUNT 6
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#define DHT_MAXTIMINGS 85
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void dht_init(struct dht22 *dht, uint8_t pin)
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{
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dht->pin = pin;
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/* Setup the pins! */
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DDR_DHT &= ~(1 << dht->pin);
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PORT_DHT |= (1 << dht->pin);
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}
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static uint8_t dht_read(struct dht22 *dht)
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{
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uint8_t tmp;
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uint8_t sum = 0;
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uint8_t j = 0, i;
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uint8_t last_state = 1;
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uint16_t counter = 0;
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/*
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* Pull the pin 1 and wait 250 milliseconds
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*/
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PORT_DHT |= (1 << dht->pin);
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_delay_ms(250);
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dht->data[0] = dht->data[1] = dht->data[2] = dht->data[3] = dht->data[4] = 0;
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/* Now pull it low for ~20 milliseconds */
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DDR_DHT |= (1 << dht->pin);
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PORT_DHT &= ~(1 << dht->pin);
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_delay_ms(20);
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cli();
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PORT_DHT |= (1 << dht->pin);
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_delay_us(40);
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DDR_DHT &= ~(1 << dht->pin);
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/* Read the timings */
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for (i = 0; i < DHT_MAXTIMINGS; i++) {
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counter = 0;
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while (1) {
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tmp = ((PIN_DHT & (1 << dht->pin)) >> 1);
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_delay_us(3);
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if (tmp != last_state)
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break;
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counter++;
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_delay_us(1);
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if (counter == 255)
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break;
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}
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last_state = ((PIN_DHT & (1 << dht->pin)) >> 1);
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if (counter == 255)
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break;
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/* Ignore first 3 transitions */
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if ((i >= 4) && (i % 2 == 0)) {
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/* Shove each bit into the storage bytes */
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dht->data[j/8] <<= 1;
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if (counter > DHT_COUNT)
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dht->data[j/8] |= 1;
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j++;
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}
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}
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sei();
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sum = dht->data[0] + dht->data[1] + dht->data[2] + dht->data[3];
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if ((j >= 40) && (dht->data[4] == (sum & 0xFF)))
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return 1;
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return 0;
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}
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uint8_t dht_read_temp(struct dht22 *dht, float *temp)
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{
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if (dht_read(dht)) {
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*temp = dht->data[2] & 0x7F;
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*temp *= 256;
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*temp += dht->data[3];
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*temp /= 10;
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if (dht->data[2] & 0x80)
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*temp *= -1;
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return 1;
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}
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return 0;
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}
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uint8_t dht_read_hum(struct dht22 *dht, float *hum)
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{
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if (dht_read(dht)) {
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*hum = dht->data[0];
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*hum *= 256;
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*hum += dht->data[1];
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*hum /= 10;
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if (*hum == 0.0f)
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return 0;
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return 1;
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}
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return 0;
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}
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uint8_t dht_read_data(struct dht22 *dht, float *temp, float *hum)
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{
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if (dht_read(dht)) {
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/* Reading temperature */
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*temp = dht->data[2] & 0x7F;
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*temp *= 256;
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*temp += dht->data[3];
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*temp /= 10;
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if (dht->data[2] & 0x80)
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*temp *= -1;
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/* Reading humidity */
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*hum = dht->data[0];
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*hum *= 256;
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*hum += dht->data[1];
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*hum /= 10;
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if (*hum == 0.0f)
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return 0;
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return 1;
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}
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return 0;
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}
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@ -0,0 +1,76 @@
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/* struct dht22 AVR Lirary
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*
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||||
* Copyright (C) 2015 Sergey Denisov.
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* Written by Sergey Denisov aka LittleBuster (DenisovS21@gmail.com)
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||||
*
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||||
* This library is free software; you can redistribute it and/or
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||||
* modify it under the terms of the GNU General Public Licence
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||||
* as published by the Free Software Foundation; either version 3
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||||
* of the Licence, or (at your option) any later version.
|
||||
*
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||||
* Original library written by Adafruit Industries. MIT license.
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||||
*
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||||
* https://github.com/LittleBuster/avr-dht22
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*/
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#ifndef __DHT22_H__
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#define __DHT22_H__
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#include <stdint.h>
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/*
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* Sensor's port
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*/
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#define DDR_DHT DDRB
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#define PORT_DHT PORTB
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#define PIN_DHT PINB
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struct dht22 {
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uint8_t data[6]; /* data from sensor store here */
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uint8_t pin; /* DDR & PORT pin */
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};
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/**
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* Init dht sensor
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* @dht: sensor struct
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* @pin: PORT & DDR pin
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*/
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void dht_init(struct dht22 *dht, uint8_t pin);
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/**
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* Reading temperature from sensor
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* @dht: sensor struct
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* @temp: out temperature pointer
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*
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* Returns 1 if succeful reading
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* Returns 0 if fail reading
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*/
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uint8_t dht_read_temp(struct dht22 *dht, float *temp);
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/**
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* Reading humidity from sensor
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* @dht: sensor struct
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* @hum: out humidity pointer
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*
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* Returns 1 if succeful reading
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* Returns 0 if fail reading
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*/
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uint8_t dht_read_hum(struct dht22 *dht, float *hum);
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/**
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* Reading temperature and humidity from sensor
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* @dht: sensor struct
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* @temp: out temperature pointer
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* @hum: out humidity pointer
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*
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* Returns 1 if succeful reading
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* Returns 0 if fail reading
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*
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* The fastest function for getting temperature + humidity.
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*/
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uint8_t dht_read_data(struct dht22 *dht, float *temp, float *hum);
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#endif
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@ -0,0 +1,243 @@
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/*
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RadioHead DHT22 Weather Station
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Copyright (c) 2017 Peter Müller <peter@crycode.de> (https://crycode.de)
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Source: https://git.cryhost.de/crycode/attiny85-radiohead-dht22-weather-sensor/-/tree/master
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||||
*/
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/**************
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config
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**************/
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||||
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/// RH_ASK works with ATTiny85, using Arduino 1.0.5 and tinycore from
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/// https://code.google.com/p/arduino-tiny/downloads/detail?name=arduino-tiny-0100-0018.zip
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/// Tested with the examples ask_transmitter and ask_receiver on ATTiny85.
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/// Caution: The RAM memory requirements on an ATTiny85 are *very* tight. Even the bare bones
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/// ask_transmitter sketch barely fits in eh RAM available on the ATTiny85. Its unlikely to work on
|
||||
/// smaller ATTinys such as the ATTiny45 etc. If you have wierd behaviour, consider
|
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/// reducing the size of RH_ASK_MAX_PAYLOAD_LEN to the minimum you can work with.
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/// Caution: the default internal clock speed on an ATTiny85 is 1MHz. You MUST set the internal clock speed
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/// to 8MHz. You can do this with Arduino IDE, tineycore and ArduinoISP by setting the board type to "ATtiny85@8MHz',
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/// setting theProgrammer to 'Arduino as ISP' and selecting Tools->Burn Bootloader. This does not actually burn a
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/// bootloader into the tiny, it just changes the fuses so the chip runs at 8MHz.
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/// If you run the chip at 1MHz, you will get RK_ASK speeds 1/8th of the expected.
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///
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/// Initialise RH_ASK for ATTiny85 like this:
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/// // #include <SPI.h> // comment this out, not needed
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/// RH_ASK driver(2000, 4, 3); // 200bps, TX on D3 (pin 2), RX on D4 (pin 3)
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||||
/// then:
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||||
/// Connect D3 (pin 2) as the output to the transmitter
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||||
/// Connect D4 (pin 3) as the input from the receiver.
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||||
///
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||||
///
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||||
/// For testing purposes you can connect 2 Arduino RH_ASK instances directly, by
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||||
/// connecting pin 12 of one to 11 of the other and vice versa, like this for a duplex connection:
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||||
///
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||||
/// \code
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||||
/// Arduino 1 wires Arduino 1
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||||
/// D11-----------------------------D12
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||||
/// D12-----------------------------D11
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||||
/// GND-----------------------------GND
|
||||
/// \endcode
|
||||
///
|
||||
/// You can also connect 2 RH_ASK instances over a suitable analog
|
||||
/// transmitter/receiver, such as the audio channel of an A/V transmitter/receiver. You may need
|
||||
/// buffers at each end of the connection to convert the 0-5V digital output to a suitable analog voltage.
|
||||
///
|
||||
/// Measured power output from RFM85 at 5V was 18dBm.
|
||||
|
||||
// pin with the LED connected
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||||
#define LED_PIN 4
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|
||||
// blink time for the LED
|
||||
#define LED_TIME 200
|
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|
||||
// pin of the DHT22 sensor
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||||
#define DHT_PIN 1
|
||||
|
||||
// the own RadioHead address
|
||||
#define RH_OWN_ADDR 0xca // 202
|
||||
|
||||
// the server RadioHead address
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||||
#define RH_SERVER_ADDR 0x01
|
||||
|
||||
// RadioHead bitrate in bit/s
|
||||
#define RH_SPEED 2000
|
||||
|
||||
// pins for the radio hardware
|
||||
#define RH_RX_PIN 5 // not used, set to a non-existent pin
|
||||
#define RH_TX_PIN 3
|
||||
#define RH_PTT_PIN 5 // not used, set to a non-existent pin
|
||||
|
||||
|
||||
/**************
|
||||
end config
|
||||
**************/
|
||||
|
||||
#include <Arduino.h>
|
||||
#include <avr/sleep.h>
|
||||
#include <avr/wdt.h>
|
||||
#include <util/delay.h>
|
||||
|
||||
// for watchdog wakeup
|
||||
// https://gist.github.com/dwhacks/8055287
|
||||
#ifndef cbi
|
||||
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
|
||||
#endif
|
||||
#ifndef sbi
|
||||
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
|
||||
#endif
|
||||
|
||||
|
||||
// DHT22 lib
|
||||
// not using the current adafruit dht library, because it eats too many memory
|
||||
#include "dht22.h"
|
||||
dht22 dht;
|
||||
|
||||
#define RH_BUF_LEN 5
|
||||
uint8_t rh_buf[RH_BUF_LEN] = { 0x00, 0x00, 0x00, 0x00, 0x00 };
|
||||
|
||||
// reduce the RadioHead max message length to save memory
|
||||
#define RH_ASK_MAX_MESSAGE_LEN RH_BUF_LEN
|
||||
|
||||
// RadioHead
|
||||
#include <RH_ASK.h>
|
||||
|
||||
#define MSG_START 0x00
|
||||
#define MSG_TEMP 0x01
|
||||
#define MSG_HUMID 0x02
|
||||
#define MSG_ERR 0xee
|
||||
|
||||
|
||||
RH_ASK rh_driver(RH_SPEED, RH_RX_PIN, RH_TX_PIN, RH_PTT_PIN);
|
||||
|
||||
// watchdog flag
|
||||
volatile boolean f_wdt = 1;
|
||||
|
||||
// temp / humid toggle
|
||||
volatile boolean toggle = 0;
|
||||
|
||||
|
||||
void gotoSleep(void);
|
||||
|
||||
void setup() {
|
||||
// setup the LED pin
|
||||
pinMode(LED_PIN, OUTPUT);
|
||||
|
||||
// init the DHT22
|
||||
dht_init(&dht, DHT_PIN);
|
||||
|
||||
|
||||
uint8_t num_blink = 3;
|
||||
|
||||
if (!rh_driver.init()) {
|
||||
num_blink = 5;
|
||||
}
|
||||
|
||||
// blink 3 times
|
||||
for (uint8_t i = 0; i < num_blink; i++) {
|
||||
digitalWrite(LED_PIN, HIGH);
|
||||
_delay_ms(LED_TIME);
|
||||
digitalWrite(LED_PIN, LOW);
|
||||
_delay_ms(LED_TIME);
|
||||
}
|
||||
|
||||
// send start message
|
||||
rh_buf[0] = MSG_START;
|
||||
rh_send(1);
|
||||
|
||||
setup_watchdog(6); // approximately 4 seconds sleep
|
||||
|
||||
}
|
||||
|
||||
// main loop
|
||||
void loop() {
|
||||
|
||||
if (f_wdt) {
|
||||
f_wdt = 0;
|
||||
// turn on the LED
|
||||
digitalWrite(LED_PIN, HIGH);
|
||||
|
||||
// temperature and humidity
|
||||
float t = 0;//float is 32bit = 1byte
|
||||
float h = 0;
|
||||
|
||||
// read from the sensor and check if it was successfull
|
||||
if (dht_read_data(&dht, &t, &h) == 1) {
|
||||
// normal message
|
||||
|
||||
if (toggle) {
|
||||
rh_buf[0] = MSG_TEMP;
|
||||
memcpy(&rh_buf[1], &t, 4);
|
||||
} else {
|
||||
rh_buf[0] = MSG_HUMID;
|
||||
memcpy(&rh_buf[1],&h,4);
|
||||
}
|
||||
toggle = !toggle;
|
||||
|
||||
rh_send(RH_BUF_LEN);
|
||||
|
||||
} else {
|
||||
// error message
|
||||
rh_buf[0] = MSG_ERR;
|
||||
rh_send(1);
|
||||
|
||||
}
|
||||
|
||||
// turn off the LED
|
||||
digitalWrite(LED_PIN, LOW);
|
||||
system_sleep();
|
||||
//_delay_ms(1000);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
// function to send RadioHead messages from the buffer
|
||||
void rh_send(uint8_t len) {
|
||||
rh_driver.send((uint8_t *)rh_buf, len);
|
||||
rh_driver.waitPacketSent();
|
||||
}
|
||||
|
||||
|
||||
|
||||
ISR(WDT_vect)
|
||||
{
|
||||
f_wdt = 1; // set global flag
|
||||
}
|
||||
|
||||
/* set system into the sleep state
|
||||
system wakes up when watchdog is timed out
|
||||
*/
|
||||
void system_sleep() {
|
||||
cbi(ADCSRA, ADEN); // switch Analog to Digitalconverter OFF
|
||||
|
||||
set_sleep_mode(SLEEP_MODE_PWR_DOWN); // sleep mode is set here
|
||||
sleep_enable();
|
||||
|
||||
sleep_mode(); // System sleeps here
|
||||
|
||||
sleep_disable(); // System continues execution here when watchdog timed out
|
||||
sbi(ADCSRA, ADEN); // switch Analog to Digitalconverter ON
|
||||
}
|
||||
|
||||
/* 0=16ms, 1=32ms,2=64ms,3=128ms,4=250ms,5=500ms
|
||||
6=1 sec,7=2 sec, 8=4 sec, 9= 8sec
|
||||
*/
|
||||
void setup_watchdog(int ii) {
|
||||
|
||||
byte bb;
|
||||
int ww;
|
||||
if (ii > 9 ) ii = 9;
|
||||
bb = ii & 7;
|
||||
if (ii > 7) bb |= (1 << 5);
|
||||
bb |= (1 << WDCE);
|
||||
ww = bb;
|
||||
|
||||
MCUSR &= ~(1 << WDRF);
|
||||
// start timed sequence
|
||||
WDTCR |= (1 << WDCE) | (1 << WDE);
|
||||
// set new watchdog timeout value
|
||||
WDTCR = bb;
|
||||
WDTCR |= _BV(WDIE);
|
||||
}
|
||||
Loading…
Reference in New Issue