Added SHT21 as a Possible Sensor Type
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@ -1,7 +1,7 @@
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# TinyLoRa Firmware
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Example Sensor Node Firmware with a BMP/E280 Sensor.
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Please Change the Values in src/secconfig.h to your Keys from https://console.thethingsnetwork.org. Device has to be set to ABP Mode.
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Please Change the Values in src/secconfig.h to your Keys from https://console.thethingsnetwork.org. Device has to be set to ABP Mode. Also since there is no permanent storage to store the Frame Counter, please disable the Frame Counter Check in the TTN console.
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Project was created using PlatformIO Atmel-AVR Framework
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@ -21,4 +21,4 @@ function Decoder(bytes, port) {
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return decoded;
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}
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```
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```
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72
Firmware/lib/SHT21/SHT21.cpp
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72
Firmware/lib/SHT21/SHT21.cpp
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@ -0,0 +1,72 @@
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/*
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main.cpp - SHT21 Sensor Library
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Copyright (c) 2019, Stefan Brand
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Arduino.h>
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#include <i2cmaster.h>
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#include <inttypes.h>
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#include "SHT21.h"
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SHT21::SHT21() {
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// Initialize I2C Bus
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i2c_init();
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}
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uint16_t SHT21::sensorRead(uint8_t command) {
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uint16_t result;
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// Trigger Measurement
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i2c_start_wait(SHT21_I2CADDR+I2C_WRITE);
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i2c_write(command);
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//if (command == SHT21_TEMPHOLD || command == SHT21_TEMPNOHOLD) {
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delay(86); // Max Measurement Time 14 bit Temperature
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//} else if (command == SHT21_HUMIHOLD || command == SHT21_HUMINOHOLD) {
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// delay(30); // Max Measurement Time 12 bit Humidity
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//}
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i2c_stop();
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// Read Value
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i2c_start_wait(SHT21_I2CADDR+I2C_READ);
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result = (i2c_readAck() << 8);
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result |= (i2c_readNak());
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i2c_stop();
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result &= ~0x0003; // Clear CRC Bits
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return result;
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}
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float SHT21::getTemperature(void) {
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return (-46.85 + 175.72 / 65536.0 * (float)(sensorRead(SHT21_TEMPHOLD)));
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}
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float SHT21::getHumidity(void) {
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return (-6.0 + 125.0 / 65536.0 * (float)(sensorRead(SHT21_HUMIHOLD)));
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}
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56
Firmware/lib/SHT21/SHT21.h
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56
Firmware/lib/SHT21/SHT21.h
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@ -0,0 +1,56 @@
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/*
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main.cpp - SHT21 Sensor Library
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Copyright (c) 2019, Stefan Brand
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SHT21_H
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#define SHT21_H
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#include <inttypes.h>
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#define SHT21_I2CADDR 0x80
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#define SHT21_TEMPHOLD 0xE3
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#define SHT21_TEMPNOHOLD 0xF3
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#define SHT21_HUMIHOLD 0xE5
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#define SHT21_HUMINOHOLD 0xF5
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#define SHT21_SOFTRESET 0xFE
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class SHT21
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{
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private:
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uint16_t sensorRead(uint8_t command);
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public:
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SHT21(void);
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float getTemperature(void);
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float getHumidity(void);
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};
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#endif
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@ -33,11 +33,19 @@
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#include <avr/wdt.h>
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#include "tinySPI.h"
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#include "LoRaWAN.h"
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#include <BME280.h>
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//Change Keys in secconfig.h for your TTN application:
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// secconfig.h Configures TTN Keys and used Sensor
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#include "secconfig.h"
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#ifdef HAS_BME280
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#include <BME280.h>
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#endif
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#ifdef HAS_SHT21
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#include <SHT21.h>
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#endif
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// Initialize RFM95W and LoraWAN
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#define DIO0 PIN_B0
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#define NSS PIN_B1
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@ -48,16 +56,20 @@ uint16_t Frame_Counter_Tx = 0x0000;
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// If set LED will blink when sending
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#define LED_PIN PIN_A7
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// Sensor Class
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// Sensorclass and deepsleep interval (for measurement about every 10Min)
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#ifdef HAS_BME280
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BME280 sensor;
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#define SLEEP_TIME 528
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#endif
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#ifdef HAS_SHT21
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SHT21 sensor;
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#define SLEEP_TIME 544
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#endif
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// Global Variable used for deep sleep
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uint16_t sleep_interval;
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// Sleep Time (s) Between Two Measurements
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#define SLEEP_TIME 528
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// Setup Wakeup Interrupt Timer
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void init_wdt()
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{
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@ -123,7 +135,6 @@ void setup()
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#ifdef LED_PIN
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pinMode(LED_PIN, OUTPUT);
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#endif
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delay(50);
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}
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@ -134,7 +145,15 @@ void loop()
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int32_t data[4];
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// Get Sensor Data
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#ifdef HAS_BME280
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sensor.getData(&data[0], &data[1], &data[2]);
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#endif
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#ifdef HAS_SHT21
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data[0] = (int32_t)(sensor.getTemperature()*100);
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data[1] = 0;
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data[2] = (int32_t)(sensor.getHumidity()*100);
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#endif
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data[3] = readVcc();
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// LED On before Sending
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