This instructable is for the software of my Weater Station Project. Please read it first to understand all explanations.Because of the both MCUs the software concept is based on two parts: The ESP8266 runs on Nodemcu and does the Internet connection and thingspeak.com related parts. The Arduino does all the sensor related things. The communication between Arduino and ESP8266 is via serial connection whereby the Arduino uses the SoftwareSerial Library on pins D2 (RX) and D3 (TX). The configura...
A closer view of the 144 MHz halo antenna. The entire antenna was weatherproofed with clear acrylic spray paint. The open ends of the boom and the PL-259 connector were sealed with a self sealing silicone tape called Rescue Tape. Both open ends of the copper loop were outside the boom with approximately 1.5" gap distance for resonance at 145 MHz.