Quantity   Component name
1 × SIM800 GSM module
1 × SST25VF016BSO8M SPI Flash memory
1 × AQY210SX Switches and Relays / Solid State Relays
1 × 6N139 Opto and Fiber Optic Semiconductors and ICs / Optocouplers and Optoisolators
1 × USBLC6-2 ESD and TVS Suppressors / ESD and Transient Voltage Suppression (TVS) Diodes and Arrays
1 × LM1117 Power Management ICs / Linear Voltage Regulators and LDOs