GeekyDeaks
commented
2 months ago Hi!
Did you spot that the baud rate has to change part way through the handshake?
It's not super clear in the code, especially if you are not familiar with golang, but it starts at 250000 and then switches to 115200.
If you don't respond to the initial handshake in time after the wheelbase is turned on, the wheelbase goes into a fallback mode, sending the same sequence of 3 bytes requesting the 7bit values for the throttle, brake and clutch. Also, I often found that the wheelbase would not properly complete the handshake if you connected the uart after the wheelbase was booted.
If you want to share your arduino code, I'm happy to take a look and see if I can offer any advice.
LoadingSky
Hello, I use Arduino to try to send data to fanatec wheelbase rj12 rx interface, but the data received by Arduino is different from what you provided. I connected the control board to fanatec wheelbase through the line jumper to Arduino to get the data. At first I tried 115200 baud rate, and got the following data: wheelbase TX: 248 wheelbase TX: 248 wheelbase TX: 248 wheelbase TX: 248 wheelbase TX: 248 .... control board TX: 250 wheelbaseTX: 249 Here wheelbase will send data like in your code wheelbaseTX: { 0x7B, 0x02, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x26, 0x7D, 0x7B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xAA, 0x7D, 0x7B, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5F, 0x7D} But at this time the control board will send a random data, like this: {10,8,8,8,8,0,8,0,0,8} I intercepted 8 and 0 many times and sometimes they were the same, but most of the time there was no pattern. I tried to connect the Arduino directly to the wheelbase, and the results were different after I followed this process to RX 249. If I try to send data like this directly 0x7B, 0x05, 0x06, 0x62, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6D, 0x7D then the wheelbase's tx is unlimited 248 Or follow the steps to send {10,8,8,8,8,0,8,0,0,8} and the result is the same. I studied it for a long time and thought that I needed an oscilloscope. The data obtained by Arduino was missing.
Actually, I saw your project a long time ago, but I don't know golang. Later, I found that the tx and rx data in your code were in the same format as the data I got. Then I followed your code and first captured the data at 250000 baud rate: wheelbaseTX:5 wheelbaseTX:5 wheelbaseTX:5 wheelbaseTX:5 ... control board TX: 29 wheelbaseTX: 2 This data is different from the code data you provided, and it has the same problem as the 115200 baud rate {10,8,8,8,8,0,8,0,0,8} became {29,0,0,0,0,0,0,0,128,0,0,128} and similar data, but I still ignored it, and tried many times with arduino, but I could never get to the third step I want to ask where I went wrong, is it because the data acquisition is incomplete, do I need to buy an oscilloscope? Or is it an Arduino problem? My native language is not English, I used Google Translate, maybe the grammar seems a little strange, but I hope you can help me, thank you very much