Case for ESP32 & HLK-PM01 PSU & 2x2 Relay modules
thingiverse
Case for a ESP32-Wroom-32U (version with an antenna) and 230V to 5V PSU and 2 x 2 relay modules. ESP: either normal development board or ESP32-WROOM-32U WiFi+BT+BLE ESP32 Module onboard antenna / U.FL IPEX IPX connector Antenna: 2.4GHz 3dBi WiFi 2.4g Antenna Aerial RP-SMA Male + 17cm PCI U.FL IPX to RP SMA Male Pigtail Cable PSU: HLK-PM01 Relay modules: 5V 2 Channel Relay Module Shield (HW-383). Remember to use optocouplers properly. Take 5V from ESP32 in parallel with IN1 and IN2 and do not connect GND! Even if same PSU, remove connector from RY-VCC and take GND and 5V from PSU. The pilar and hook is for ESP32 mini version (size 18 x 19.2 x 3.2). Threads are for ISO 2.5mm screws (M2.5 x 0.45, class 6H, right handed). 5 mm length (M2.5 x 5) works fine. Micropython code example for IoT (mqtt) https://github.com/divergentti/kotiautomaatio/tree/master/esp32/releohjaus2x2
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