ESP32 Tilt Repeater

tilt_repeater.ino

// ESP32 Tilt Repeater
// By David Gray

#include "BLEDevice.h"
#include "BLEBeacon.h"
#include "esp_deep_sleep.h"

// User Settings
int SCAN_TIME = 5;              // Duration to scan for bluetooth devices (in seconds).
int TIME_TO_SLEEP = 60;         // Duration ESP32 will go to sleep between scans (in seconds).
int fastSleep = 4;              // Scan more often if no Tilts are found. TIME_TO_SLEEP(60) / fastSleep(4) = scan every 15 seconds. Use 0 to disable.
int repeatColour = 0;           // Choose Tilt colour to repeat. 0=All, 1=Red, 2=Green, 3=Black, 4=Purple, 5=Orange, 6=Blue, 7=Yellow, 8=Pink.
bool Celsius = true;            // Use Celcius while logging to serial.

int uS_TO_S_FACTOR = 1000000;
BLEAdvertising *pAdvertising;
BLEScan* pBLEScan;

void setBeacon(String TiltUUID, float TiltMajor, int TiltMinor) {
  BLEBeacon oBeacon = BLEBeacon();
  oBeacon.setManufacturerId(0x4C00); // fake Apple 0x004C LSB (ENDIAN_CHANGE_U16!)
  BLEUUID bleUUID = BLEUUID(TiltUUID.c_str());
  bleUUID = bleUUID.to128();
  oBeacon.setProximityUUID(BLEUUID( bleUUID.getNative()->uuid.uuid128, 16, true ));

  oBeacon.setMajor(TiltMajor); // Temp in Freedumb units
  oBeacon.setMinor(TiltMinor); // Gravity * 1000
  BLEAdvertisementData oAdvertisementData = BLEAdvertisementData();
  BLEAdvertisementData oScanResponseData = BLEAdvertisementData();
  
  oAdvertisementData.setFlags(0x04); // BR_EDR_NOT_SUPPORTED 0x04
  
  std::string strServiceData = "";
  
  strServiceData += (char)26;     // Len
  strServiceData += (char)0xFF;   // Type
  strServiceData += oBeacon.getData();
  oAdvertisementData.addData(strServiceData);
  
  pAdvertising->setAdvertisementData(oAdvertisementData);
  pAdvertising->setScanResponseData(oScanResponseData);
}

int parseTilt(String DevData) {
  String DevUUID, DevColour, DevTempData, DevGravityData;
  int colourInt;
  float DevTemp, DevGravity;

  // Determine the Colour
  colourInt = DevData.substring(6, 7).toInt();

  switch (colourInt) {
    case 1:
      DevColour = "Red";
      break;
    case 2:
      DevColour = "Green";
      break;
    case 3:
      DevColour = "Black";
      break;
    case 4:
      DevColour = "Purple";
      break;
    case 5:
      DevColour = "Orange";
      break;
    case 6:
      DevColour = "Blue";
      break;
    case 7:
      DevColour = "Yellow";
      break;
    case 8:
      DevColour = "Pink";
      break;
  }

  if (repeatColour != 0 && repeatColour != colourInt) {
    Serial.print(DevColour);
    Serial.println(" Tilt is being ignored.");
    return 0;
  }

  //Generate the UUID
  DevUUID += DevData.substring(0, 8);
  DevUUID += "-";
  DevUUID += DevData.substring(8, 12);
  DevUUID += "-";
  DevUUID += DevData.substring(12, 16);
  DevUUID += "-";
  DevUUID += DevData.substring(16, 20);
  DevUUID += "-";
  DevUUID += DevData.substring(20, 32);

  // Get the temperature
  DevTempData = DevData.substring(32, 36);
  DevTemp = strtol(DevTempData.c_str(), NULL, 16); // Temp in Freedumb units

  // Get the gravity
  DevGravityData = DevData.substring(36, 40);
  DevGravity = strtol(DevGravityData.c_str() , NULL, 16);

  Serial.println("--------------------------------");
  Serial.print("Colour: ");
  Serial.println(DevColour);
  Serial.print("Temp: ");
  if (Celsius) {
     Serial.print((DevTemp-32.0) * (5.0/9.0));
     Serial.println(" C");
  }
  else {
    Serial.print(DevTemp);
    Serial.println(" F");
  }
  Serial.print("Gravity: ");
  float DevGravityFormatted = (DevGravity / 1000);
  Serial.println(DevGravityFormatted, 3);
  Serial.println(DevData);
  Serial.println("--------------------------------");

  BLEDevice::init("");
  //Adjust Power 3 is default, 9 is max
  esp_err_t errRc = esp_ble_tx_power_set(ESP_BLE_PWR_TYPE_DEFAULT, ESP_PWR_LVL_P9);
  esp_ble_tx_power_set(ESP_BLE_PWR_TYPE_ADV, ESP_PWR_LVL_P9);

  pAdvertising = BLEDevice::getAdvertising();
  setBeacon(DevUUID, DevTemp, DevGravity);
  pAdvertising->start();
  Serial.print("Advertizing ");
  Serial.print(DevColour);
  Serial.println(" Tilt");
  delay(100);
  pAdvertising->stop();
  BLEDevice::deinit(0);
  return 2;
}


void setup() {
  int deviceCount, tiltCount = 0;
  int colourFound = 1;
  Serial.begin(115200);

  BLEDevice::init("");
  //Adjust Power 3 is default, 9 is max
  esp_err_t errRc = esp_ble_tx_power_set(ESP_BLE_PWR_TYPE_DEFAULT, ESP_PWR_LVL_P9);
  esp_ble_tx_power_set(ESP_BLE_PWR_TYPE_SCAN, ESP_PWR_LVL_P9);

  pBLEScan = BLEDevice::getScan();
  pBLEScan->setActiveScan(true);
  Serial.println();
  Serial.println("Scanning...");
  BLEScanResults foundDevices = pBLEScan->start(SCAN_TIME);
  deviceCount = foundDevices.getCount();
  Serial.print(deviceCount);
  Serial.println(" Devices Found.");
  pBLEScan->stop();
  BLEDevice::deinit(0);

  for (uint32_t i = 0; i < deviceCount; i++)
  {
    BLEAdvertisedDevice Device = foundDevices.getDevice(i);
    String DevString, DevData;
    DevString = Device.toString().c_str();
    DevData = DevString.substring(63);

    if (DevData.substring(7, 32) == "0c5b14b44b5121370f02d74de") { // Tilt found
      tiltCount++;
      Serial.print("Device #");
      Serial.print(i);
      Serial.println(" is a Tilt");
      int tiltSuccess = parseTilt(DevData);
      if (tiltSuccess == 2) {
        colourFound = 2;
      }
      if (!tiltSuccess && colourFound != 2) {
        colourFound = 0;
      }
    }
  }

  if (!tiltCount || !colourFound) {
    Serial.println("No Tilts Repeated.");
    esp_sleep_enable_timer_wakeup((TIME_TO_SLEEP/fastSleep) * uS_TO_S_FACTOR);
  }
  else {
    esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
  }

  esp_deep_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_OFF);
  
  Serial.print("Going to sleep for ");
  if (!tiltCount || !colourFound) {
    Serial.print(TIME_TO_SLEEP/fastSleep);
  }
  else {
    Serial.print(TIME_TO_SLEEP);
  }
  Serial.println(" seconds ");
  Serial.flush(); 

  esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_SLOW_MEM, ESP_PD_OPTION_OFF);
  esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_FAST_MEM, ESP_PD_OPTION_OFF);
  esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_OFF);
  esp_deep_sleep_start();
}

void loop() {

}

Hi David...thanks for posting! The code was relatively easy to follow, and I used it as a template for my stand-alone auto-spunding rig that uses the gravity readings from the Tilt to set spunding PSI and control pressure release. The power-saving logic crashed my device (esp32doit-devkit-v1), but since my application doesn't need it ( I'm running on a 12V supply for the pressure release solenoids), I didn't try to figure out why.

Can anyone please re-write the code as "#include "esp_deep_sleep.h" is as it's deprecated. Many thanks Richard

I get the following error:
Compilation error: esp_deep_sleep.h: No such file or directory

Could someone please re write the code. Thanks

Oh thank you very much.
I will grab that code when I have time and modify it to send the data via lora to another esp32 with display to show the data.
This really solves my problem to transport the data to some other esp32 with lora to display the data.
\o/ I have no power and wifi in my cellar but I want to see the fermentation progress in my livingroom ;)
That will be a nice solution to the problem, because transmitting data over lora is no problem through some floors ;)