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- Tue Jul 14, 2026 5:22 pm
- Forum: Hardware
- Topic: ESP32-S3 UART RX receives nothing despite pin confirmed electrically alive and radar confirmed transmitting - GPIO42 (JT
- Replies: 1
- Views: 25
ESP32-S3 UART RX receives nothing despite pin confirmed electrically alive and radar confirmed transmitting - GPIO42 (JT
Board: ESP32-S3-CAM (GOOUUU N16R8, ESP32-S3-WROOM-1U-N16R8 module). Peripheral: HLK-LD2451 UART radar, 115200 8N1. Wiring: radar TX → ESP32 GPIO42 (RX), ESP32 GPIO41 (TX) → radar RX, shared GND, radar powered (confirmed 5.1V at its VCC pin with or without seperate power supply - power not issue ...