ESP Odometer is a simple WiFi-enabled device that counts and stores the number of tire revolutions and exposes this value through REST API.
The revolutions counter is stored on internal EEPROM, so power on/off cycles doesn't clear it.
Tested on ESP8266 WeMos D1 Mini on Suzuki SV650 (1999-2002) equipped with a stock speed sensor.
| PATH | METHOD | PARAMS | DESCRIPTION |
|---|---|---|---|
| / | GET | Get current revolutions value | |
| /reset | POST | Reset internal revolutions counter to 0 | |
| /set | POST | revolutions (int) | Set internal revolutions counter to an arbitrary value |
Params are sent via x-www-form-urlecoded. All requests produces the same JSON response, for example:
{
"revolutions": 19245,
"firmware": "0.1a"
}
Curl examples:
curl -X GET http://192.168.4.1/
curl -X POST http://192.168.4.1/reset
curl -X POST http://192.168.4.1/set --data "revolutions=19245"
#define WIFI_ESSID "SV650"
#define WIFI_PASSWORD "12345678"
#define SERVER_PORT 80
#define TRIGGER_STEP 4
#define DEBUG 1
#define DEBUG_SERIAL_BAUDRATE 115200
#define SIMULATE 0
- DEBUG = 0: debug disabled.
- DEBUG = 1: debug output enabled.
- DEBUG = 2: verbose debug output.
- SIMULATE = 0: real working, no simulation.
- SIMULATE = 1: reed sensor reading is disabled, the revolutions counter increase automatically every second.
- TRIGGER_STEP: the number of impulse generate by a single tire revolution. It depends on your speed sensor, 4 or 8 is a common value.
