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How to add an external antenna to an ESP board - #20 by laca75tn - ESPHome - Home Assistant Community
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pcb - How can I attach a custom built antenna to the NodeMCU (ESP-12E) - Electrical Engineering Stack Exchange
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Amazon.com: Mayata WEMOS D1 Mini Pro 4MB/16MB External Antenna Connector NodeMCU Based esp8266 Series Antenna ESP-8266EX CP2104 Development Board (Development Board + Antenna 32MBIT=4MB) : Electronics
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