Add (very crude) Sensair S8 Sensor Support

lib/SENSAIRS8/SENSAIRS8.cpp

@@ -0,0 +1,67 @@
+/*
+  .cpp - SENSAIRS8 Sensor Library
+  Copyright (c) 2020-2021, Stefan Brand
+  All rights reserved.
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+  1. Redistributions of source code must retain the above copyright notice, this
+     list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+  3. Neither the name of the copyright holder nor the names of its
+     contributors may be used to endorse or promote products derived from
+     this software without specific prior written permission.
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <Arduino.h>
+#include "SENSAIRS8.h"
+
+// Constructor - Inititalize Hardware UART
+SENSAIRS8::SENSAIRS8(void) {
+    Serial.begin(9600);
+    Serial.setTimeout(READ_TIMEOUT);
+}
+
+void SENSAIRS8::getSensorData(lora_data &loradata) {
+  uint8_t _cmd[7] = {0xFE, 0x44, 0x00, 0x08, 0x02, 0x9F, 0x25};
+  while (Serial.available() > 0) Serial.read();
+    Serial.write(_cmd, 7);
+
+  delay(1000);
+  uint8_t readBytes = read();
+  
+  if (readBytes > 0) {
+    loradata.ppm = (buffer[3]*256) + buffer[4];
+  }
+}
+
+// Read a Sensor Response
+uint8_t SENSAIRS8::read() {
+    // Number of returned Bytes
+    uint8_t ret = 0;
+    // Clear Internal Buffer
+    zeroBuffer();
+
+    // Read Available Bytes
+    if (Serial.available() > 0) {
+      ret = Serial.readBytes(buffer, SER_BUF_LEN);
+    }
+    return ret;
+}
+
+// Fill the Internal Buffer with Zeroes
+void SENSAIRS8::zeroBuffer() {
+    for (int i=0; i < SER_BUF_LEN; i++)
+        buffer[i] = 0x00;
+}

lib/SENSAIRS8/SENSAIRS8.h

@@ -0,0 +1,52 @@
+/*
+  SENSAIRS8.h - SENSAIRS8 Sensor Library
+  Copyright (c) 2020-2021, Stefan Brand
+  All rights reserved.
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+  1. Redistributions of source code must retain the above copyright notice, this
+     list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+  3. Neither the name of the copyright holder nor the names of its
+     contributors may be used to endorse or promote products derived from
+     this software without specific prior written permission.
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef SENSAIRS8_H
+#define SENSAIRS8_H
+
+// Data Structure for the LoRa Packet
+struct lora_data {
+  uint8_t bat;
+  int16_t ppm;
+} __attribute__ ((packed));
+
+#define READ_TIMEOUT 500  // Timeout for Serial Communication
+#define SER_BUF_LEN  7   // Length of the Internal Serial Message Buffer
+
+class SENSAIRS8 {
+  private:
+    uint8_t buffer[SER_BUF_LEN];
+
+    uint8_t read();
+    void zeroBuffer(void);
+    uint16_t getPPM(void);
+
+  public:
+    SENSAIRS8(void);
+    void getSensorData(lora_data &loradata);
+};
+
+#endif

src/main.cpp

@@ -55,6 +55,9 @@ void blink(uint8_t num) {
 #elif defined HAS_SG112A
   #include <SG112A.h>
   SG112A sensor;
+#elif defined HAS_SENSAIRS8
+  #include <SENSAIRS8.h>
+  SENSAIRS8 sensor;
 #elif defined HAS_BME280
   #include <BME280.h>
   BME280 sensor;
@@ -88,7 +91,7 @@ const lmic_pinmap lmic_pins = {
 };
 
 // List of unused Pins - will be disabled for Power Saving
-#if defined DEBUG || defined HAS_SG112A || defined HAS_MHZ19C
+#if defined DEBUG || defined HAS_SG112A || defined HAS_MHZ19C || defined HAS_SENSAIRS8
 const int disabledPins[] = {PIN_PB5, PIN_PB4, PIN_PB1, PIN_PB0, PIN_PC3, PIN_PC2, PIN_PC1, PIN_PC0};
 #else
 const int disabledPins[] = {PIN_PB5, PIN_PB4, PIN_PB3, PIN_PB2, PIN_PB1, PIN_PB0, PIN_PC3, PIN_PC2, PIN_PC1, PIN_PC0};