Been experimenting with Daly common port 4s 100amp BMS's and decided to test a bluetooth BMS . Sourced a DGJBD 4s 100a unit from China.I was pleasantly surprised when it arrived - very nice piece of kit, well made and comes with a bluetooth dongle and RS232 / USB converter and cable to connect to PC. Wired it all up and downloaded JBD Tools V1.6 and iOS app and started experimenting. The manual, which I had to download, is quite well written bar a few translation issues. Bluetooth as well as the serial connection work extremely well and connections are established within a few seconds. All the settings are accessible via both communication media. The unit has 2x temp sensors which can be calibrated. My overall impression of the device / monitoring software is very positive and tests are ongoing.
Product code: JBD-SP04S020
The information posted above in the 'description' should have been posted here. Seems I am unable to edit that section - new to this and still learning.