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Amazon.com: Stemedu USB to ESP8266 ESP-01S Programmer Wireless WiFi Transceiver ESP-01 PROG Serial Adapter Module CH340G with 4MB Flash, 115200 Baud Rate : Electronics
Amazon.com: AITRIP 5PCS ESP8266 ESP-01S WiFi Serial Transceiver Module with 1MB Flash DIP-8 3-6V for Arduino (ESP-01S) : Automotive
