tweaks

src/BME280.cpp

@@ -13,17 +13,12 @@ bool BME280::begin(void) {
 //  SPI.begin(BME_SCK, BME_MISO, BME_MOSI, BME_CS);
   pinMode(18, OUTPUT);
   digitalWrite(18, HIGH); // disable LoRa_CS
-  pinMode(23, OUTPUT);
-  digitalWrite(23, HIGH);  // enable bme280 CS
-  delay(50);
+  pinMode(BME_CS, OUTPUT);
+  digitalWrite(BME_CS, LOW);  // enable bme280 CS
+  delay(100);
   bme = new Adafruit_BME280(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
-  int retries = 0;
-  while (!(valid = bme->begin())) {
-    if (retries > 5) break;
-    retries++;
-    Serial.println("Could not find a valid BME280 sensor, check wiring!");
-    delay(500);
-  }
+  valid = bme->begin();
+  if (!valid) bme->init();
   if (!valid) return false;
 
   bme->setSampling(Adafruit_BME280::sensor_mode::MODE_NORMAL,
@@ -45,8 +40,29 @@ void BME280::sleep() {
                    Adafruit_BME280::standby_duration::STANDBY_MS_1000);
 }
 
-void BME280::init() {
-  bme->init();
+bool BME280::reinit() {
+  pinMode(18, OUTPUT);
+  digitalWrite(18, HIGH); // disable LoRa_CS
+  pinMode(BME_CS, OUTPUT);
+  digitalWrite(BME_CS, LOW);  // enable bme280 CS
+
+  int retries = 0;  valid = false;
+  while (!valid) {
+    if (retries > 9) break;
+    valid = bme->init();
+    retries++;
+
+    delay(100);
+    float p = bme->readPressure() / 100.0F;
+    if (p < 300 || p > 1100) valid = false;
+
+//    constexpr byte BME280_REGISTER_SOFTRESET = 0xE0;
+//    bme->write8(BME280_REGISTER_SOFTRESET, 0xB6);
+  }
+  if (!valid) {
+    Serial.println("Could not find a valid BME280 sensor, check wiring!");
+    return false;
+  }
 }
 
 void BME280::printValues() {

src/BME280.h

@@ -18,7 +18,7 @@ class BME280 {
   public:
     BME280();
     bool begin(void);
-    void init(void);
+    bool reinit(void);
     void printValues(void);
     float readTemperature(void);
     float readPressure(void);

src/hardware.h

@@ -19,6 +19,14 @@ static constexpr uint8_t ext_wakeup_pin_2 = 0;
 static constexpr uint32_t secondsToSleep = 15*60;
 static constexpr int batteryLimit = 2800;
 
+#define SX1276_SCK 5
+#define SX1276_MISO 19
+#define SX1276_MOSI 27
+#define SX1276_CS 18
+#define SX1276_RST 14
+#define SX1276_IRQ 26
+#define SX1276_BAND 868
+
 
 /* Wiring (Heltec OLED Lora)
  *              GND O                    O GND

src/main.cpp

@@ -26,6 +26,8 @@
 #include <sys/time.h>
 #include "apps/sntp/sntp.h"
 
+//#include <LoRa.h>
+
 #include "driver/rtc_io.h"
 
 #include "main.h"
@@ -38,6 +40,8 @@
 
 extern "C" {
 int rom_phy_get_vdd33();
+//uint8_t temprature_sens_read();
+//uint32_t hall_sens_read();
 }
 
 U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ 16, /* clock=*/ 15, /* data=*/ 4);
@@ -126,12 +130,23 @@ void setup() {
   strftime(strftime_buf, sizeof(strftime_buf), "%c", &timeinfo);
   Serial.print("Current time: "); Serial.println(strftime_buf);
 
+/*  SPI.begin(SX1276_SCK, SX1276_MISO, SX1276_MOSI, SX1276_CS);
+  LoRa.setPins(SX1276_CS, SX1276_RST, SX1276_IRQ);// set CS, reset, IRQ pin
+
+  if (!LoRa.begin(SX1276_BAND)) {             // initialize ratio at 915 MHz
+    Serial.println("LoRa init failed. Check your connections.");
+    while (true);                       // if failed, do nothing
+  }*/
+
   bme280.begin();
-  bme280.printValues();
+//  bme280.printValues();
 
   if (wakeup_reason == ESP_SLEEP_WAKEUP_TIMER) {
     for (int i=0; i<15 && iot.wifi.status() != WL_CONNECTED; i++) delay(500);
-    if (iot.wifi.status() == WL_CONNECTED) transmitStatus();
+    if (iot.wifi.status() == WL_CONNECTED) {
+      transmitStatus();
+      obtain_time();
+      }
 
     double seconds = difftime(now, mktime(&alarmTime));
     Serial.printf("alarm in %f seconds\n", seconds);
@@ -149,6 +164,7 @@ void setup() {
   menuChange = eMainScreen;
   u8g2.setContrast(127);
 
+
   //Set up the Callbacks for the MQTT instance. Refer to the Async MQTT Client documentation
   // TODO: We should do this actually _before_ connecting the mqtt client...
   iot.mqtt.onConnect(onMqttConnect);
@@ -172,6 +188,9 @@ void setup() {
         time(&now);
     }
 
+  if (timeinfo.tm_hour < 7 || timeinfo.tm_hour > 23) u8g2.setContrast(1);
+  else u8g2.setContrast(127);
+
   mp3.begin();
   led.setup();
 
@@ -199,8 +218,11 @@ void transmitStatus() {
   float humi = bme280.readHumidity();
   float pres = bme280.readPressure();
 
+  float internal_temp = temperatureRead();
+  int internal_hall = hallRead();
+
   for (int retry=0; retry<3 && !bme280.valid; retry++) {
-    bme280.init();
+    bme280.reinit();
     delay(250);
     humi = bme280.readHumidity();
     bme280.readPressure();
@@ -209,14 +231,18 @@ void transmitStatus() {
 
   StaticJsonBuffer<200> jsonBuffer;
   JsonObject& root = jsonBuffer.createObject();
-  root["temperature"] = bme280.readTemperature();
-  root["humidity"] = bme280.readHumidity();
-  root["pressure"] = bme280.readPressure();
+  if (bme280.valid) {
+    root["temperature"] = bme280.readTemperature();
+    root["humidity"] = bme280.readHumidity();
+    root["pressure"] = bme280.readPressure();
+  } else {
+    root["temperature"] = internal_temp;
+  }
 
   char sensorBuf[root.measureLength()+1];
   root.printTo(sensorBuf, sizeof(sensorBuf));
   uint16_t statusPacketIdSub;
-  if (bme280.valid) statusPacketIdSub = iot.mqtt.publish(bme280Topic.c_str(), 0, false, sensorBuf);
+  statusPacketIdSub = iot.mqtt.publish(bme280Topic.c_str(), 0, false, sensorBuf);
 //  statusPacketIdSub = iot.mqtt.publish(bme280Topic.c_str(), 1, true, sensorBuf);
   int voltage = rom_phy_get_vdd33();
   char batteryBuf[9];
@@ -267,8 +293,7 @@ void suspend(uint32_t secondsToSleep) {
     u8g2.sendBuffer();
     u8g2.setFont(u8g2_font_inb19_mf);
     u8g2.drawStr(0, 20, timeStr);
-    // ToDo: set rtc gpio resistors
-    //rtc_gpio_hold_en((gpio_num_t)16);
+    rtc_gpio_hold_en((gpio_num_t)16); // 16 not connected to ulp processor :(
     esp_sleep_enable_timer_wakeup(1000000LL * 60);
   }
 

src/mp3.cpp

@@ -19,6 +19,8 @@
 
 char titleStr[64];
 
+// convert mp3 files with `xxd -i alarm.wav > alarmsound.h`
+
 MP3::MP3() {
     strncpy_P(URL, "http://streaming.shoutcast.com/80sPlanet?lang=en-US", sizeof(URL));
     //const char *URL="http://swr-swr1-bw.cast.addradio.de/swr/swr1/bw/mp3/64/stream.mp3";