Hi y'all, and thanks in advance for your help on my first question here 
I am building my first LiFePo4 bank, so everything lithium is new to me...
Problem comes with communication with the bms in my 4s setup - Qucc QJ-34U4CB.
I did all the connections carefully, even taped any exposed wires to avoid shorts, so I assume everything hardware is correct (charge and discharge is still disconnected at the moment though, but I understand it shouldn't affect the BMS itself?)
When switching the BMS on, I can hear the relay latch closed, and the bluetooth dongle led blinks. So I assume the BMS works.
I used the app they linked me to and connection to the dongle seems successful, the led gets steady when connected.
But no data at all!
I tried several other apps, some connect but say "data retrieve error", some don't even see the dongle.
If relevant, I see 2 bluetooth devices in the settings : JDY-33-SPP and JDY-33-BLE,
But the app only detects JDY-33-BLE.
I didn't manage to get data on the display either yet via RS485 (JBD-LCD02-RS485, says "connect error")
QUESTIONS :
- Is it normal to have such a struggle to make bluetooth work or am i doing something wrong?
- is it a problem that comes from the BMS, the dongle or is it possible that it comes from uncompatibility with my phone in your opinion?
- is there anything I can try to make it work?
- any suggestion on an app that could work with this BMS?
I am also in touch with QUCC customer service, which is surprizingly good for a chinese company.
They said to contact them today to talk to a technician, will update if they give me a solution.
Thanks for your help!!
J.
I am building my first LiFePo4 bank, so everything lithium is new to me...
Problem comes with communication with the bms in my 4s setup - Qucc QJ-34U4CB.
I did all the connections carefully, even taped any exposed wires to avoid shorts, so I assume everything hardware is correct (charge and discharge is still disconnected at the moment though, but I understand it shouldn't affect the BMS itself?)
When switching the BMS on, I can hear the relay latch closed, and the bluetooth dongle led blinks. So I assume the BMS works.
I used the app they linked me to and connection to the dongle seems successful, the led gets steady when connected.
But no data at all!
I tried several other apps, some connect but say "data retrieve error", some don't even see the dongle.
If relevant, I see 2 bluetooth devices in the settings : JDY-33-SPP and JDY-33-BLE,
But the app only detects JDY-33-BLE.
I didn't manage to get data on the display either yet via RS485 (JBD-LCD02-RS485, says "connect error")
QUESTIONS :
- Is it normal to have such a struggle to make bluetooth work or am i doing something wrong?
- is it a problem that comes from the BMS, the dongle or is it possible that it comes from uncompatibility with my phone in your opinion?
- is there anything I can try to make it work?
- any suggestion on an app that could work with this BMS?
I am also in touch with QUCC customer service, which is surprizingly good for a chinese company.
They said to contact them today to talk to a technician, will update if they give me a solution.
Thanks for your help!!
J.
