ESP32-S3-RS485-CAN: Industrial Module with Wi-Fi, Bluetooth, RS485, and CAN Bus Interfaces
By
@elektroda.bsky.social
4d ago· 6 min readen
100/100
Golden Brown
Bagelometer↗
Master baker tier. Every paragraph earns its place on the tray.
Score100Typehow-toSentimentneutral
Summary
The ESP32-S3-RS485-CAN is an industrial-grade microcontroller module featuring Wi-Fi, Bluetooth, isolated RS485 and CAN bus interfaces, DIN-rail mounting, and a PCF85063 RTC with battery backup. It ships with 16 MB Flash and 8 MB RAM, operates up to 36 V DC, and costs around £80. The article provides setup instructions for PlatformIO, including configuration adjustments for flash size, framework settings, and CDC mode for native USB serial output. Demo code covers LED blinking, RS485 communication via HardwareSerial, CAN bus communication using the TWAI library, and RTC access over I2C.
Key quotes
· 5 pulledESP32-S3-RS485-CAN is an industrial ESP32-S3 module with Wi‑Fi, Bluetooth, isolated RS485 and CAN, DIN-rail mounting, and a PCF85063 RTC with battery backup.
PlatformIO setup starts from an esp32-s3-devkitc-1 configuration, then adjusts flash size, framework settings, and CDC mode so Serial.printf works over native USB.
The board ships with 16 MB Flash, 8 MB RAM, operates up to 36 V DC, and costs around £80.
Demo code shows LED blinking, RS485 transmission using HardwareSerial, CAN communication with TWAI, and RTC access over I2C via the Wire library.
A battery keeps the RTC running
ESP32-S3-RS485-CAN is an industrial module equipped with Wi-Fi, BT (thanks to ESP-S3) and isolated RS485 and CAN communications. It is designed for DIN rail mounting. It operates on voltages up to 36 V DC. Also on board is a PCF85063 RTC to keep time alon
