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() {

}

Rev 4 added fastSleep variable and adjusted some timings to help save some power.

Rev 5 added ability to choose a single Tilt colour and some possible power saving enhancements.

Hi David, I have loaded this to an ESP32 using Arduino IDE. It appears to flash okay. Got 100% and said leaving. I have had no success with this as it has not been showing anything from the tilt to the Raspberry PI Zero W. The PI Zero W is loaded with the Tilt PI with image program from the Tilt website. I am able to get the Tilt to display on the small HDMI monitor so no problem there. I am having trouble with the tilt transmitting through the SS fermenter and the refrigerator and hoping this was my answer. I am a complete novice with this so if you can point me in the correct direction that would be much appreciated. tks John

You can load the serial monitor in Arduino ide while USB is still connected to test if it flashed correctly and has found any tilt devices. Past that I would try the tilt app on mobile phone. To try to get a signal. I personally do not use the tiltpi software and cannot offer any assistance with it.

Hi David, Thank you Still no luck. I have done a bit more searching and realised that you were on the Aussiehomebrewer site. So if you dont mind I will hit you with a few more questions. Regards John

…

________________________________ From: David Gray <[email protected]> Sent: Wednesday, 25 March 2020 6:16 PM To: N3MIS15 <[email protected]> Cc: Nedhbb <[email protected]>; Comment <[email protected]> Subject: Re: N3MIS15/tilt_repeater.ino @N3MIS15 commented on this gist.

________________________________ You can load the serial monitor in Arduino ide while USB is still connected to test if it flashed correctly and has found any tilt devices. Past that I would try the tilt app on mobile phone. To try to get a signal. I personally do not use the tiltpi software and cannot offer any assistance with it. — You are receiving this because you commented. Reply to this email directly, [X] view it on GitHub<https://gist.github.com/72658a024eb0dfde6d1c0958092acd42#gistcomment-3226434>, or [X] unsubscribe<https://github.com/notifications/unsubscribe-auth/AO4OS2VKYSSS6L75WF2U6LLRJGVVFANCNFSM4JFL4BAQ>.

Good morning, Im very new and using an ESP32 to run this script. Having worked fine, it now seems to have dropped out. Is this owing to the board re-setting and the location of where I had written the data? Should this be written to flash memory ? If it isn't already, what do I need to change in the arduino software to write it to flash or is it an addition of EEPROM.write(address, value); (if I knew how to). Thanks

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