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ESP32, ESP8266. ESP32 chip with integrated antenna and RF, power amplifier, low noise amplifiers, filters. Relay Modules. The entire solution takes up the least amount on printed circuit board. Power Supplies.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.