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This commit is contained in:
Stefan Ostermann 2021-04-04 23:54:53 +02:00
parent c685867d51
commit ede85c0d8e
9 changed files with 600 additions and 0 deletions
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sensor433/.gitignore vendored Normal file
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.pio
.vscode/.browse.c_cpp.db*
.vscode/c_cpp_properties.json
.vscode/launch.json
.vscode/ipch

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{
// See http://go.microsoft.com/fwlink/?LinkId=827846
// for the documentation about the extensions.json format
"recommendations": [
"platformio.platformio-ide"
]
}

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This directory is intended for project header files.
A header file is a file containing C declarations and macro definitions
to be shared between several project source files. You request the use of a
header file in your project source file (C, C++, etc) located in `src` folder
by including it, with the C preprocessing directive `#include'.
```src/main.c
#include "header.h"
int main (void)
{
...
}
```
Including a header file produces the same results as copying the header file
into each source file that needs it. Such copying would be time-consuming
and error-prone. With a header file, the related declarations appear
in only one place. If they need to be changed, they can be changed in one
place, and programs that include the header file will automatically use the
new version when next recompiled. The header file eliminates the labor of
finding and changing all the copies as well as the risk that a failure to
find one copy will result in inconsistencies within a program.
In C, the usual convention is to give header files names that end with `.h'.
It is most portable to use only letters, digits, dashes, and underscores in
header file names, and at most one dot.
Read more about using header files in official GCC documentation:
* Include Syntax
* Include Operation
* Once-Only Headers
* Computed Includes
https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

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This directory is intended for project specific (private) libraries.
PlatformIO will compile them to static libraries and link into executable file.
The source code of each library should be placed in a an own separate directory
("lib/your_library_name/[here are source files]").
For example, see a structure of the following two libraries `Foo` and `Bar`:
|--lib
| |
| |--Bar
| | |--docs
| | |--examples
| | |--src
| | |- Bar.c
| | |- Bar.h
| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
| |
| |--Foo
| | |- Foo.c
| | |- Foo.h
| |
| |- README --> THIS FILE
|
|- platformio.ini
|--src
|- main.c
and a contents of `src/main.c`:
```
#include <Foo.h>
#include <Bar.h>
int main (void)
{
...
}
```
PlatformIO Library Dependency Finder will find automatically dependent
libraries scanning project source files.
More information about PlatformIO Library Dependency Finder
- https://docs.platformio.org/page/librarymanager/ldf.html

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sensor433/platformio.ini Normal file
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; PlatformIO Project Configuration File
;
; Build options: build flags, source filter
; Upload options: custom upload port, speed and extra flags
; Library options: dependencies, extra library storages
; Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html
; attiny85 programmed via Arduino Uno, fuses and speed set to 8Mhz:
[env:attiny85]
platform = atmelavr
board = attiny85
framework = arduino
; Arduino Uno as ISP: (arduino / custom also seen):
upload_protocol = stk500v1
; each flag in a new line
upload_flags =
-P$UPLOAD_PORT
-b$UPLOAD_SPEED
; edit these lines
upload_port = /dev/ttyACM0
upload_speed = 19200
lib_deps = mikem/RadioHead@^1.113
; http://eleccelerator.com/fusecalc/fusecalc.php?chip=attiny85
board_build.f_cpu = 8000000L
; Platformio Project Tasks -> Set Fuses!
board_fuses.lfuse = 0xE2
board_fuses.hfuse = 0xDF

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/* Fast DHT Lirary
*
* Copyright (C) 2015 Sergey Denisov.
* Written by Sergey Denisov aka LittleBuster (DenisovS21@gmail.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version 3
* of the Licence, or (at your option) any later version.
*
* Original library written by Adafruit Industries. MIT license.
*
* https://github.com/LittleBuster/avr-dht22
*/
#include "dht22.h"
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#define DHT_COUNT 6
#define DHT_MAXTIMINGS 85
void dht_init(struct dht22 *dht, uint8_t pin)
{
dht->pin = pin;
/* Setup the pins! */
DDR_DHT &= ~(1 << dht->pin);
PORT_DHT |= (1 << dht->pin);
}
static uint8_t dht_read(struct dht22 *dht)
{
uint8_t tmp;
uint8_t sum = 0;
uint8_t j = 0, i;
uint8_t last_state = 1;
uint16_t counter = 0;
/*
* Pull the pin 1 and wait 250 milliseconds
*/
PORT_DHT |= (1 << dht->pin);
_delay_ms(250);
dht->data[0] = dht->data[1] = dht->data[2] = dht->data[3] = dht->data[4] = 0;
/* Now pull it low for ~20 milliseconds */
DDR_DHT |= (1 << dht->pin);
PORT_DHT &= ~(1 << dht->pin);
_delay_ms(20);
cli();
PORT_DHT |= (1 << dht->pin);
_delay_us(40);
DDR_DHT &= ~(1 << dht->pin);
/* Read the timings */
for (i = 0; i < DHT_MAXTIMINGS; i++) {
counter = 0;
while (1) {
tmp = ((PIN_DHT & (1 << dht->pin)) >> 1);
_delay_us(3);
if (tmp != last_state)
break;
counter++;
_delay_us(1);
if (counter == 255)
break;
}
last_state = ((PIN_DHT & (1 << dht->pin)) >> 1);
if (counter == 255)
break;
/* Ignore first 3 transitions */
if ((i >= 4) && (i % 2 == 0)) {
/* Shove each bit into the storage bytes */
dht->data[j/8] <<= 1;
if (counter > DHT_COUNT)
dht->data[j/8] |= 1;
j++;
}
}
sei();
sum = dht->data[0] + dht->data[1] + dht->data[2] + dht->data[3];
if ((j >= 40) && (dht->data[4] == (sum & 0xFF)))
return 1;
return 0;
}
uint8_t dht_read_temp(struct dht22 *dht, float *temp)
{
if (dht_read(dht)) {
*temp = dht->data[2] & 0x7F;
*temp *= 256;
*temp += dht->data[3];
*temp /= 10;
if (dht->data[2] & 0x80)
*temp *= -1;
return 1;
}
return 0;
}
uint8_t dht_read_hum(struct dht22 *dht, float *hum)
{
if (dht_read(dht)) {
*hum = dht->data[0];
*hum *= 256;
*hum += dht->data[1];
*hum /= 10;
if (*hum == 0.0f)
return 0;
return 1;
}
return 0;
}
uint8_t dht_read_data(struct dht22 *dht, float *temp, float *hum)
{
if (dht_read(dht)) {
/* Reading temperature */
*temp = dht->data[2] & 0x7F;
*temp *= 256;
*temp += dht->data[3];
*temp /= 10;
if (dht->data[2] & 0x80)
*temp *= -1;
/* Reading humidity */
*hum = dht->data[0];
*hum *= 256;
*hum += dht->data[1];
*hum /= 10;
if (*hum == 0.0f)
return 0;
return 1;
}
return 0;
}

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/* struct dht22 AVR Lirary
*
* Copyright (C) 2015 Sergey Denisov.
* Written by Sergey Denisov aka LittleBuster (DenisovS21@gmail.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version 3
* of the Licence, or (at your option) any later version.
*
* Original library written by Adafruit Industries. MIT license.
*
* https://github.com/LittleBuster/avr-dht22
*/
#ifndef __DHT22_H__
#define __DHT22_H__
#include <stdint.h>
/*
* Sensor's port
*/
#define DDR_DHT DDRB
#define PORT_DHT PORTB
#define PIN_DHT PINB
struct dht22 {
uint8_t data[6]; /* data from sensor store here */
uint8_t pin; /* DDR & PORT pin */
};
/**
* Init dht sensor
* @dht: sensor struct
* @pin: PORT & DDR pin
*/
void dht_init(struct dht22 *dht, uint8_t pin);
/**
* Reading temperature from sensor
* @dht: sensor struct
* @temp: out temperature pointer
*
* Returns 1 if succeful reading
* Returns 0 if fail reading
*/
uint8_t dht_read_temp(struct dht22 *dht, float *temp);
/**
* Reading humidity from sensor
* @dht: sensor struct
* @hum: out humidity pointer
*
* Returns 1 if succeful reading
* Returns 0 if fail reading
*/
uint8_t dht_read_hum(struct dht22 *dht, float *hum);
/**
* Reading temperature and humidity from sensor
* @dht: sensor struct
* @temp: out temperature pointer
* @hum: out humidity pointer
*
* Returns 1 if succeful reading
* Returns 0 if fail reading
*
* The fastest function for getting temperature + humidity.
*/
uint8_t dht_read_data(struct dht22 *dht, float *temp, float *hum);
#endif

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/*
RadioHead attiny85 DHT22 Weather Station
2021 Stefan Ostermann based on several source from the internetz.
*NOT working in platformio right now!*
Sources:
https://git.cryhost.de/crycode/attiny85-radiohead-dht22-weather-sensor/-/tree/master
*/
// pin with the LED connected
#define LED_PIN 4
// blink time for the LED
#define LED_TIME 200
// pin of the DHT22 sensor
#define DHT_PIN 1
// the own RadioHead address
#define RH_OWN_ADDR 0xca // 202
// the server RadioHead address
#define RH_SERVER_ADDR 0x01
// RadioHead bitrate in bit/s
#define RH_SPEED 1000
// 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
#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's too memory intensive
#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>
// Message Headers:
#define MSG_START 0x00
#define MSG_TEMP 0x01
#define MSG_HUMID 0x02
#define MSG_BAT 0x03
#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 uint8_t counter = 0;
// prototypes:
void gotoSleep(void);
int getVcc();
void rh_send(uint8_t len);
void setup_watchdog(int ii);
void system_sleep();
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;
long battery = 0;
if (counter % 4 == 0) {
rh_buf[0] = MSG_BAT;
battery = getVcc();
memcpy(&rh_buf[1], &battery, 4);
rh_send(RH_BUF_LEN);
}else if (dht_read_data(&dht, &t, &h) == 1) {
if (counter % 2 == 0) {
rh_buf[0] = MSG_TEMP;
memcpy(&rh_buf[1], &t, 4);
} else if (counter % 2 == 1) {
rh_buf[0] = MSG_HUMID;
memcpy(&rh_buf[1], &h, 4);
}
rh_send(RH_BUF_LEN);
} else {
// error message
rh_buf[0] = MSG_ERR;
rh_send(1);
}
counter++;
// 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);
}
/**
From https://github.com/cano64/ArduinoSystemStatus/blob/master/SystemStatus.cpp
*/
int getVcc() {
//reads internal 1V1 reference against VCC
ADMUX = _BV(MUX3) | _BV(MUX2); // For ATtiny85/45
_delay_ms(5);; // Wait for Vref to settle
ADCSRA |= _BV(ADSC); // Convert
while (bit_is_set(ADCSRA, ADSC));
uint8_t low = ADCL;
unsigned int val = (ADCH << 8) | low;
//discard previous result
ADCSRA |= _BV(ADSC); // Convert
while (bit_is_set(ADCSRA, ADSC));
low = ADCL;
val = (ADCH << 8) | low;
return (long)val;
}

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This directory is intended for PlatformIO Unit Testing and project tests.
Unit Testing is a software testing method by which individual units of
source code, sets of one or more MCU program modules together with associated
control data, usage procedures, and operating procedures, are tested to
determine whether they are fit for use. Unit testing finds problems early
in the development cycle.
More information about PlatformIO Unit Testing:
- https://docs.platformio.org/page/plus/unit-testing.html