diff --git a/sensor433/.gitignore b/sensor433/.gitignore new file mode 100644 index 0000000..89cc49c --- /dev/null +++ b/sensor433/.gitignore @@ -0,0 +1,5 @@ +.pio +.vscode/.browse.c_cpp.db* +.vscode/c_cpp_properties.json +.vscode/launch.json +.vscode/ipch diff --git a/sensor433/.vscode/extensions.json b/sensor433/.vscode/extensions.json new file mode 100644 index 0000000..0f0d740 --- /dev/null +++ b/sensor433/.vscode/extensions.json @@ -0,0 +1,7 @@ +{ + // See http://go.microsoft.com/fwlink/?LinkId=827846 + // for the documentation about the extensions.json format + "recommendations": [ + "platformio.platformio-ide" + ] +} diff --git a/sensor433/include/README b/sensor433/include/README new file mode 100644 index 0000000..194dcd4 --- /dev/null +++ b/sensor433/include/README @@ -0,0 +1,39 @@ + +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 diff --git a/sensor433/lib/README b/sensor433/lib/README new file mode 100644 index 0000000..6debab1 --- /dev/null +++ b/sensor433/lib/README @@ -0,0 +1,46 @@ + +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 +#include + +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 diff --git a/sensor433/platformio.ini b/sensor433/platformio.ini new file mode 100644 index 0000000..061e3d3 --- /dev/null +++ b/sensor433/platformio.ini @@ -0,0 +1,30 @@ +; 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 \ No newline at end of file diff --git a/sensor433/src/dht22.cpp b/sensor433/src/dht22.cpp new file mode 100644 index 0000000..db16b3a --- /dev/null +++ b/sensor433/src/dht22.cpp @@ -0,0 +1,149 @@ +/* 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 +#include +#include + + +#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; +} diff --git a/sensor433/src/dht22.h b/sensor433/src/dht22.h new file mode 100644 index 0000000..50d7fef --- /dev/null +++ b/sensor433/src/dht22.h @@ -0,0 +1,76 @@ +/* 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 + +/* + * 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 + diff --git a/sensor433/src/main.cpp b/sensor433/src/main.cpp new file mode 100644 index 0000000..84bb123 --- /dev/null +++ b/sensor433/src/main.cpp @@ -0,0 +1,237 @@ +/* + 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 +#include +#include +#include + +// 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 + + +// 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; +} diff --git a/sensor433/test/README b/sensor433/test/README new file mode 100644 index 0000000..b94d089 --- /dev/null +++ b/sensor433/test/README @@ -0,0 +1,11 @@ + +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