Installation and use of iTPMS based on CANBus messages for wheel speed in T7 cars with ESP/TCS
Installation of Arduino IDE and the extra libraries
- Download Arduino and install the stable version of Arduino IDE for your operation system: https://www.arduino.cc/en/Main/Software Accept all standard setting and install all of the required add-ons
- Start Arduino
- Open the attached sketch (.ino)
- In File>Preferences find the empty field called “Additional Boards Manager URL” and paste this link there: http://arduino.esp8266.com/stable/package_esp8266com_index.json
- Open board manager from Tools>Board:Arduino/Genunino Uno>Boards Manager
- Search for esp8266, it will find only one result, click install
- Go to https://github.com/Seeed-Studio/CAN_BUS_Shield, click download or clone and download the zip file. Then extract it here: C:\Users\YourUserNmae\Documents\Arduino\libraries
- Replace the mcp_can.h and mcp_can_dfs.h files in C:\Program Files (x86)\Arduino\libraries\CAN_BUS_Shield-master with the ones provided in this project
- Go to Tool>Board and select NodeMCU 1.0
- Go to Tool>Board and select the appropriate com port
- Go to Tool>Board and select the highest upload speed
- Restart Arduino IDE
- Open the Sketch and click the upload button (right arrow). If everything went well it will start to flash the logger.
If you have a normal Arduino board instead of ESP8266, you can skip steps 4-7
Usage: The main idea is that the bluetooth dongle has prev/next buttons as well as play/pause/answer phone buttons. The buttons work by grounding the other connection, so we can use a microcontroller to ground them instead. I used my favorite esp8266+mcp2515 combo from this topic: http://www.trionictuning.com/forum/viewtopic.php?f=46&t=6831 We need microcontroller and canbus, since the steering wheel buttons work by providing different resistance, the SID measures it and trasforms it to CAN messages on the I-Bus. Hardware connections:
- Connect the ESP and the MCP as in the logger topic
- Connect D0 on the ESP to the active lead of the Play button on the bluetooth
- Connect D1 on the ESP to the active lead of the Next button on the bluetooth
- Connect D2 on the ESP to the active lead of the Prev button on the bluetooth
- Connect CAN H and CAN L from the MCP to the back board of the headunit (they are clearly marked)
- Connect the power lined of the ESP, MCP and Bluetooth together and put some kind of filter cap on the bluetooth device (optional)
More information here: http://www.trionictuning.com/forum/viewtopic.php?f=46&t=7436&p=76538&hilit=bluetooth+steering+wheel#p76538
Handsfree specific:
Unsolder the wires of the microphone and solder longer leads on it. Then stick it in on of the holes of the face plate like so:
Video demo:
