Trying to get my Treadmill jooked up via Bluetooth. Here is what I’ve got so far before working on an actual sensor. I thought it would record inclination data and pass it on to the fit file but does not appear to be there looking in Garmin connect or fit converted to tcx. Might be a mistake in my code. Anyways if I can’t get it to record inclination data anywhere might go back to emulating a footpod. Can anyone confirm if their treadmill (for those with ble built-in) or microcontroller adapter was able to get inclination data recorded into Zwift? If so, where did you see it?
Here is my code I’m using:
#include <ArduinoBLE.h>
BLEService fitness_machine_service(“1826”); // Fitness Machine Service
BLECharacteristic RSCMeasurementChar(“2ACD”, BLENotify, 8); // Treadmill Data
uint16_t inst_speed = 0; // Instantaneous speed in units of .01 km/h
uint16_t incl_percent = 20; // How feel going uphill or downhill. Signed, units of .1 percent
uint16_t ramp_angle = 20; // Angle of inclination of treadmill ramp. Signed, units of .l degree
float kmph=0.0;
float old_kmph=0.0;
void setup() {
Serial.begin(9600);
while (!Serial);
pinMode(LED_BUILTIN,OUTPUT);
if (!BLE.begin()) {
Serial.println(“starting BLE failed”);
while(1);
}
BLE.setLocalName(“HorizonTreadMill”);
BLE.setAdvertisedService(fitness_machine_service);
fitness_machine_service.addCharacteristic(RSCMeasurementChar);
BLE.addService(fitness_machine_service);
BLE.advertise();
Serial.println(“Bluetooth device active, waiting for connection…”);
}
void loop() {
BLEDevice central = BLE.central();
if (central) {
Serial.print("Connected to central: ");
Serial.println(central.address());
digitalWrite(LED_BUILTIN,HIGH);
while (central.connected()) {
kmph = 10.5;
inst_speed = kmph*100; // Sent in units of .01 km/h
// 2 bytes of flags,
byte byteArray[8] = {
4,0,
(unsigned byte)inst_speed, (unsigned byte) (inst_speed >> 8),
(unsigned byte)incl_percent, (unsigned byte) (incl_percent >> 8),
(unsigned byte)ramp_angle, (unsigned byte) (ramp_angle >> 8)
};
RSCMeasurementChar.writeValue(byteArray,8);
}
}
digitalWrite(LED_BUILTIN,LOW);
Serial.print("Disconnected from central: ");
Serial.println(central.address());
}
but you might compare the parts where characteristics are being added … I do have in addition to:
