The Internet of Things is developing at a rapid pace, as hobbyists and companies rush to develop the latest and greatest home automation gear. One area of particular interest to some is lighting – yes, even the humble lightbulb now comes with a brain and is ripe for the hacking.
[Tinkerman] starts by doing a full disassembly of the Sonoff B1 lightbulb. It’s a popular device, and available for less than $20 on eBay. Rated at 6 watts, the bulb has a heatsink that is seemingly far larger than necessary. Inside is the usual AC/DC converter, LED driver and an ESP8285 running the show. While this is a slightly different part to the usual ESP8266, it can be programmed in the same way by selecting the correct programming mode.
This is where it gets interesting – [Tinkerman] flashes the device with a custom firmware known as ESPurna. This firmware enables greater control over the function of the bulb, from colour choice, to speaking to the bulb over MQTT.
[Tinkerman] does a great job of walking through the exact steps needed to disassemble and reprogram the bulb, and touches upon the added flexibility given by the custom firmware. We love to see projects like this one, that give greater control over IoT devices and enable users to better integrate them with other systems.
Filed under: led hacks
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