I purchased this to work with a 50A Tracer. It's replicated and more the internal metering available on the MT50 and I'm using it to publish directly to MQTT where home-assistant takes over any plotting and status changes.
Delivery to AU was good (covid delays considering), the 3D printed case needed a very minor tweak to get the USB outlet aligned for programming the latest lolin D1 minis, but in normal production use (one RJ45 cable from the charge controller), this is a non-issue. The discord community is active, and there's a steady stream of minor tweaks and improvements happening on GitHub.
This gadget's perfect to help keep USB power banks from falling asleep, and the little orange cases they come in are really solid. I used a USB power meter to see how much power it uses on its own (without anything attached), and it reported 49 mA per hour. Shipping was fast too. Thank you!
Keeps my power bank alive when powering most low-powered devices I tried. Easy to assemble (provided you can solder and can read resistor colour bands) and the optional case fits perfectly. I might recommend adding a marking on the pcb to differentiate the male and female usb connectors, as one could solder them in the wrong positions. I figured it out by looking at the photo. Maybe I missed something? But this only took two minutes to figure out.
Dec. 13, 2020
The Keep Alive Timer kept my powerbank alive as described.
Delighted to get a properly finished product well packed and delivered quickly! Nicely soldered in a very clean 3D printed case that closes with a very comforting but easy 'snap'. I wonder if Colin would offer a case with embedded initials for an extra sum?
I ordered this to test with a BN series common negative charge controller - it works perfectly! It arrived pre-programmed with ESP-Link firmware, setup was as simple as connecting to the ESP wifi, browsing to the ESP's web interface on http://192.168.4.1 and setting the name and password for the network I wanted to connect it to. I'm using socat on linux to connect the virtual COM port and Colin's scripts to dump data into InfluxDB for graphing in Grafana.
This is a well designed solution and I look forward to purchasing more when they're available.
I'm using this on an Epever Triron 30amp N series. Make sure to watch the associated videos on YouTube. You will need a programmer to configure the ESP8266, though I just wired up a USB to TTL adapter (https://randomnerdtutorials.com/flashing-nodemcu-firmware-on-the-esp8266-using-windows/) and it worked fine. I had the best results with the commercial COM2TCP program by Astrogeeks, referenced in the video. I also found that I had to run the Epever monitor in supervisor mode for it to work properly. Once its all said and done, it works great.
Response from Colin Hickey | Oct. 30, 2018
Hi Michael, Thank you for the positive review. I've configured all ESP modules up with esplink prior to dispatch so it should have already had the firmware on. I was using 2.2.3 but have moved to the newer 3.x versions for the revised pcb design. Regarding the com2tcp if you checkout my later videos I've had great success with the free application HW Virtual Serial Port. I shall put this on the listing also with some more instructions also.