Quantity   Component name
1 × ESP-03 Module ESP8266 Module
1 × MOC3041 Opto and Fiber Optic Semiconductors and ICs / Optocouplers and OptoisolatorsDriver
1 × BTA12 Discrete Semiconductors / Thyristors (DIACs, SIDACs, TRIACs, SCRs)
1 × 14K275 Varistor