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While organizing stuff in my lab, I found my Adafruit FONA module. It is a SIM808 cellular radio. You could build your own cell phone or 2G data device. So I grabbed my Hologram.io SIM card and embarked on sending MQTT messages to Adafruit.io. The payload? GPS coordinates.
DetailsIf you're new to cellular modules and AT-Commands, you might want to check out my detailed blog post.
James Lewis
11 projects • 591 followers
Electronics enthusiast, Bald Engineer, and freelance content creator. AddOhms on YouTube. KN6FGY.
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