by ControlBits

Environmental Monitoring for the Internet of Things

View all updates Sep 14, 2020

Components Are In & Voltage Is Down

by Jon Luke

It’s now been a week since our crowdfunding campaign was successfully completed, and we’ve wasted no time in getting the first production build underway.

All components have been ordered and delivered to our office here in North Wales, UK. They are now being checked and re-packed and will soon be on their way to our contract manufacturer in China.

After a tiny tweak (more details below), the final PCB design files have now been released to the PCB manufacturer, and production is scheduled to begin this week. So, one week in, we’re still on schedule to hit our delivery estimate!

Design Update - EMIT Validated Down to Six Volts

We’ve also been doing some testing lately, and we’ve validated that EMIT will work on power supplies down to six volts. (It was previously validated at seven volts.) I know what you’re thinking ("big deal"), but this change is actually quite useful as it means EMIT can be used with a wider variety of power supplies. It even opens up the possibility of using battery power (e.g. a six volt lead-acid battery) for smart-greenhouse applications.

We pushed this change to the PCB design files before sending them to the manufacturer, so all EMIT boards will ship with the full operating range of six to 12 volts.

More updates soon!

About the Author

Jon Luke

ControlBits-Jon  ·   United Kingdom

$3,180 raised

of $3,000 goal

106% Funded! Order Below

Product Choices


EMIT - Board Only

A dev board with a socket for a 30-pin DOIT ESP32 DEVKIT V1 (not included), an integrated temperature and humidity sensor, a microSD slot, an I/O expansion socket, and an 5 A SPST relay.


EMIT - Full Kit

A Wi-Fi- and Bluetooth-enabled ESP32-based dev board with an integrated temperature and humidity sensor, a microSD slot, an I/O expansion socket, and an 5 A SPST relay. Includes a 30-pin DOIT ESP32 DEVKIT V1, a custom enclosure, an 8 GB microSD card, and a USB cable.



At Control Bits we're dedicated to building great IoT products that are open to everyone through education, hardware development kits, and open source software. Along the way we aim to build an open and vibrant community.

Jonathan Luke

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