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https://github.com/nopnop2002/esp-idf-CANBus-Monitor
Monitor Canbus traffic
https://github.com/nopnop2002/esp-idf-CANBus-Monitor
can can-bus esp-idf esp32
Last synced: about 2 months ago
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Monitor Canbus traffic
- Host: GitHub
- URL: https://github.com/nopnop2002/esp-idf-CANBus-Monitor
- Owner: nopnop2002
- License: mit
- Created: 2020-07-17T23:21:14.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2024-07-30T20:46:41.000Z (about 2 months ago)
- Last Synced: 2024-07-31T01:07:13.187Z (about 2 months ago)
- Topics: can, can-bus, esp-idf, esp32
- Language: C
- Homepage:
- Size: 81.1 KB
- Stars: 105
- Watchers: 8
- Forks: 24
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-canbus - ESP-IDF-CANBus-Monitor - Monitor Canbus traffic ESP32. (Hardware / Espressif Systems (ESP8266, ESP32))
README
# esp-idf-CANBus-Monitor
Monitor Canbus traffic.
# Background
Windows application for monitoring CANBus is published [here](https://github.com/SeeedDocument/USB-CAN-Analyzer/tree/master/res/Program).
This tool is designed to be used with this hardware.
So, I made the hardware side with ESP32.
# Application structure
```
+-------------+ +-------------+ +-------------+ +-------------+
| Windows | | USB-TTL | | | | SN65HVD23x |
| Application |<--(USB)-->| Converter |<--(TTL)-->| ESP32 |<--(TWAI)-->| CAN-BUS |<--(CAN BUS)-->CAN Network
| | | | | | | Transceiver |
+-------------+ +-------------+ +-------------+ +-------------|
```
# Software requirement
ESP-IDF V4.4/V5.x.
ESP-IDF V5.1 is required when using ESP32C6.
# Hardware requirements
1. Windows PC
Windows applications can be downloaded from here.
- [V7.10](https://github.com/SeeedDocument/USB-CAN_Analyzer/tree/master/res/USB-CAN%20software%20and%20drive(v7.10)/Program)
- [V7.20](https://github.com/SeeedDocument/USB-CAN-Analyzer/tree/master/res/V7.20)
- [V8.00](https://github.com/SeeedDocument/USB-CAN-Analyzer/tree/master/res/Program)
2. USB-TTL Converter
ESP32 development board has USB.
This USB connects to Linux and is used for writing the firmware and displaying the LOG.
Need converter to connect with Windows PC.
|Converter||ESP32|ESP32-S2/S3|ESP32-C3/C6||
|:-:|:-:|:-:|:-:|:-:|:-:|
|RXD|--|GPIO4|GPIO17|GPIO4|(*1)|
|TXD|--|GPIO5|GPIO18|GPIO5|(*1)|
|GND|--|GND|GND|GND||
(*1) You can change using menuconfig. But it may not work with other GPIOs.
3. SN65HVD23x CAN-BUS Transceiver
SN65HVD23x series has 230/231/232.
They differ in standby/sleep mode functionality.
Other features are the same.
4. Termination resistance
I used 150 ohms.
# Wireing
|SN65HVD23x||ESP32|ESP32-S2/S3|ESP32-C3/C6||
|:-:|:-:|:-:|:-:|:-:|:-:|
|D(CTX)|--|GPIO21|GPIO19|GPIO0|(*1)|
|GND|--|GND|GND|GND||
|Vcc|--|3.3V|3.3V|3.3V||
|R(CRX)|--|GPIO22|GPIO20|GPIO1|(*1)|
|Vref|--|N/C|N/C|N/C||
|CANL|--||||To CAN Bus|
|CANH|--||||To CAN Bus|
|RS|--|GND|GND|GND|(*2)|
(*1) You can change using menuconfig. But it may not work with other GPIOs.
(*2) N/C for SN65HVD232
# Test Circuit
```
+-----------+ +-----------+ +-----------+
| Atmega328 | | Atmega328 | | ESP32 |
| | | | | |
| Transmit | | Receive | | 21 22 |
+-----------+ +-----------+ +-----------+
| | | | | |
+-----------+ +-----------+ | |
| | | | | |
| MCP2515 | | MCP2515 | | |
| | | | | |
+-----------+ +-----------+ | |
| | | | | |
+-----------+ +-----------+ +-----------+
| | | | | D R |
| MCP2551 | | MCP2551 | | VP230 |
| H L | | H L | | H L |
+-----------+ +-----------+ +-----------+
| | | | | |
+--^^^--+ | | +--^^^--+
| R1 | | | | R2 |
|---+-------|-------+-------|-------+-------|---| BackBorn H
| | |
| | |
| | |
|-----------+---------------+---------------+---| BackBorn L
+--^^^--+:Terminaror register
R1:120 ohms
R2:150 ohms(Not working at 120 ohms)
```
# Installation
```
git clone https://github.com/nopnop2002/esp-idf-CANBus-Monitor
cd esp-idf-CANBus-Monitor
idf.py set-target {esp32/esp32s2/esp32s3/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash
```
# Configuration
## CAN Setting
## UART Setting
# How to use
- Add ESP32 to CanBus.
- Write firmware to ESP32.
- Connect ESP32 and Windows PC using USB-TTL Converter.
- Start a Windows application.
# Windows application User manual
See [here](https://github.com/nopnop2002/esp-idf-CANBus-Monitor/tree/master/UserManual).
Official document is [here](https://github.com/SeeedDocument/USB-CAN-Analyzer/tree/master/res/Document).
# Reference
https://github.com/nopnop2002/esp-idf-candump
https://github.com/nopnop2002/esp-idf-can2http
https://github.com/nopnop2002/esp-idf-can2mqtt
https://github.com/nopnop2002/esp-idf-can2usb
https://github.com/nopnop2002/esp-idf-can2websocket
https://github.com/nopnop2002/esp-idf-can2socket