ESP32 firmware for monitoring and controlling DPS5020 programmable DC power supplies via Modbus RTU. Includes a web interface for live monitoring, MQTT integration, and OTA updates.

Pin assignments are defined in main/hardware/BoardConfig.h.

Download the factory binary for your target from the Releases page.

Option A — Browser (no install required): Use the ESP Web Flasher and flash the factory binary at address 0x0000.

Option B — Command line:

esptool.py --chip esp32c3 write_flash 0x0000 DPS50xx-esp32c3-factory.bin

After the initial flash, subsequent updates can be done OTA via the web UI.

Requires ESP-IDF v6.0+ and Node.js 22+ with pnpm.

cd frontend && pnpm install && pnpm build && cd ..
idf.py set-target esp32c3
idf.py build
idf.py -p COM11 flash monitor

From the web UI's firmware page:

• Application firmware — upload DPS50xx-<target>-app.bin
• WWW partition — upload DPS50xx-<target>-www.bin to update just the web interface

The device uses dual OTA partitions with automatic rollback.

This project is unlicensed. Use it however you want.