Connect two Longan Nanos via two TJA1050 CAN bus driver modules
The Counter Longan counts and sends the value to the Button Longan which displays the received value.
The Button Longan checks the button state and sends the status to the Counter Longan, which displays the received value and lights the LED accordingly.
The button message uses Standard ID 0x345, the count message uses Extended ID 0x1d22c405.
When compiling specify the target with the -e option.
pio run -e counter -t upload
pio run -e button -t upload
| Button | Counter | ||
|---|---|---|---|
| Longan Nano | TJA1050 | TJA 1050 | Longan Nano |
| 5V | 5V | 5V | 5V |
| Gnd | Gnd | Gnd | Gnd |
| B8 | Rx | - | - |
| B9 | Tx | - | - |
| - | - | Rx | B8 |
| - | - | Tx | B9 |
| - | CAN H | CAN H | - |
| - | CAN L | CAN L | - |