07-09-2025, 02:17 PM
MQTT over Wi-Fi was way easier to scale and manage. Once you get Mosquitto set up on the Pine, the ESP32s publish cleanly with good reliability. Latency stays low if you keep the network local and stable. UART/USB is okay if you’ve got just one or two ESP32s and care more about simplicity or power savings. But once you hit 3+ devices, it turns into a cabling mess and gets fragile, especially over time.