Read on for more details
Dead USB-Uart adapter (CH340G based) for connecting to the Daly Smart BMS taken apart to see why it died.
It seems when the BMS went to sleep and woke up a high voltage may have appeared on the rx/tx lines and fried the chip (did not check/test theory).
Solution: Try an opto-isolated usb-uart
This is the pinout from the Daly SMART BMS side.
I needed this pinout to wire up a new opto-isolated usb-uart dongle for my BMS. More details in the next post
Video inside post
Here it is, the first attempt at a replacement module.
All 7 leds are controllable, and all 7 push buttons work as intended.
Luck or good planning? I used up all the pins with no need to re-wire. If you know the esp8266 well, you will know there is a limited amount of gpio and even less of them can be shared/used flexibly as they are shared with other functions such as GPIO-0 to select boot mode. Read further to see the details and some sample code you can try yourself.
They have arrived!
Some things changed compared to the FCC images, for the better. Details on the pins and connections. The MCU is a CC2530 chip (low cost zigbee capable mcu)
Inexpensive 7-button decora sized zigbee wall controller for home automation that can possibly be changed to work with Zigbee2Mqtt or wifi. Initial analysis and ideas.
What is this on my desk ....... could it be? a proper benchpower supply. Yes it is !
I
ts been quite some time since I last made an entry. Life got busy and didnt have the time to keep posting.
Many projects came and went I would of liked to have shared with you.
The train set sadly got put away.
One of the more fun projects Im working on is a power wheels conversion/upgrade.
Super small dc-dc step down converter modified to be super accurate and easy to adjust.