EEZ Bench Box 3

by Envox

Modular, open-source test & measurement chassis

View all updates Dec 25, 2019

IoT infrastructure features and OSHWA certification

by Denis Kotlar (a.k.a. prasimix)

IoT is the latest buzzword that everyone in the IT and electronics industries now wants to list as a feature of the products they create. It has become a household term, one that promises to revolutionize existing processes, replace common habits, and render popular solutions obsolete. All of which has led to an explosion of devices, some useful and some – like IoT cat feeders and Wi-Fi-enabled toasters – not so useful.

EEZ BB3’s IoT functionality is more evolution than revolution. Its remote control and monitoring capabilities began with SCPI support. We then gave EEZ Studio the ability to serve as a cross-platform automation hub for SCPI-enabled instruments connected over Ethernet or through serial-over-USB. Finally, to round out this IoT feature set, we have added MQTT support.

MQTT is one of the most popular IoT communication protocols due to its simplicity, its ability to deliver Quality of Service data, its bandwidth efficiency, and the fact that it is data agnostic, among other features. Below is a short video that illustrates how easily MQTT can be used to display the output states and values of a connected EEZ BB3’s DC power modules. For testing purposes, Eclipse Mosquitto has been activated as an MQTT server (or message broker), and the open source MQTT Explorer provides the client. As shown in the video, data sent over MQTT by EEZ BB3 can also be stored in the database for additional processing and analysis, for presentation using tools like Grafana, or for archival purposes.

EEZ BB3’s integration into your IoT infrastructure will become even more valuable with the release of additional modules that capture data, monitor efficiency, track battery charge and discharge cycles, etc.

OSHWA certified hardware

We are happy to announce that EEZ BB3 is now OSHWA-certified as open hardware.

OSHWA Certification provides an easy and straightforward way for producers to indicate that their products meet a uniform and well-defined standard for open source compliance. This allows users to know that hardware complies with the community definition of open source hardware. The OSHWA certification mark can only be used by projects that comply with the community definition. EEZ BB3’s OSHWA UID is HR000002:

Merry Christmas everyone,


About the Author

Denis Kotlar (a.k.a. prasimix)


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Support EEZ Studio Development

EEZ Studio is a cross-platform free and open source BB3 development environment but also attractive SCPI controller that is used to access many T&M devices using SCPI commands. Its development and support cost us money and your donation will help us to keep it alive and kicking.


BB3 - Starter (Without Peripheral Modules)

A BB3 enclosure kit without bare PCBs but with fully-assembled core modules (AUX-PS, MCU STM32F7, and BP3C DIB 3-slot backplane). The Starter provides an environment for experimenters who are willing to build their own modules or who want a specific BB3 configuration (such as a six-channel BB3).


BB3 - Two Channel (Full)

A BB3 starter kit and two full-featured DCP405 single-channel (40 V, 5 A) peripheral power modules, including an AC/DC power module for each. A two-channel programmable power source with advanced features: remote sensing, remote programming, a down-programmer, and additional OVP (with crowbar).


BB3 - Four Channel (Full)

A BB3 starter kit, two full-featured DCP405 single-channel (40 V, 5 A) peripheral power modules, and one dual-channel DCM220 peripheral power module. Includes all three necessary AC/DC modules. This is the two-channel full kit, expanded to include two additional programmable power sources.


DCP405 One Channel Module (Full)

A full-featured DCP405 single-channel (40 V, 5 A) peripheral power module with remote sensing, remote programming, a down-programmer and crowbar OVP. Includes an AC/DC module.


DCM220 Two Channel Module

A DCM220 dual-channel (2 x 20 V, 4 A) peripheral power module and its AC/DC module.


Cable Set

Two pairs of high quality, silicone, color marked (black-red), 1 m connecting cables; a pair of clip-on probes; and a pair of insulated crocodile clips.


BB3 Enclosure & Bare Boards

A BB3 enclosure kit with a wire harness, nuts and bolts for the three core modules, a 4.3" TFT touchscreen display, an encoder knob, and an 80 mm fan. Includes a set of bare PCBs for building the three core modules (AUX-PS, MCU STM32F7, and BP3C DIB 3-slot backplane) as well as PCBs for building one DCM220 two-channel peripheral power module and two single-channel peripheral power modules (either the DCP405 or the DCP405B, as they can be assembled using the same PCB). Suitable for builders with the necessary skill, time, and patience.



Envox d.o.o. is home of the Envox Experimental Zone (EEZ), an open source initiative to bridge the gap between DIY / hobbyist / educational / low-budget and professional / commercial test and measurement solutions.

Denis Kotlar (a.k.a. prasimix)

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