Add JK balancer support #18
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I'm sorry, I'm a novice pi user, with my ESP Home instance running on a Home Assistant Supervised docker and me not understanding this feature of github... how do I do this feature branch? |
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Okay in this case just flash this configuration (you've to change it a bit to use ethernet instead of wifi f.e.): |
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OK tried that, same repeated result. I swapped the pins around and same answer. If this is because of the WT32-ETH01 board I'm using, I am able to try a ESP32 devkit v1 and place a wifi AP in the container to test. Would the pins RX2 (16) and TX2 (17) along with one of the GND pins be suitable on this board? |
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Yes. Should work! |
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Which GPIOs do you use at the moment at your WT32-ETH01? |
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I use GPIO5 RXD and GPIO17 TXD and the GND pin below it. Datasheet I am not sure about the (RS)485_EN function pin and it is not on a regular ESP32 so I dont use it. |
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I have connected the ESP32 Dev Kit V1 and it reports the same. I have then swapped pins around, same. I then suspected the pins I was using were not correct so I set them to your GPIO14 & 4. same result My next thought |
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Could you provide a high-res photo of the mainboard? |
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Syssi I must thank you for this effort you are putting in here! Outstanding! Thank you for your help! |
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here is a zoom in on the IC i think you want to see (and was not clear) it says a VP3082
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Good catch! This is a "Low-Power RS-485 Transceiver". In this case you have to add a RS485 to TTL converter module between the balancer and the ESP. |
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Yes, I thought the same, so I reconnected my RS485 module back in, and I see the TX light flash every 5 secs but there is no data received in the logs or RX light on the module. |
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SUCCESS after research into RS485 problems, by swapping A & B to correct for a polarity error. |
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Reverting to main branch returns the following: Still at 9600 baud rate |
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You should use 115200 baud now. |
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Please try to use the original protocol again instead of this feature branch: |
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I have received the same data response as before and the data is not correct. I believe the formatting for the balancer rs485 protocol v1.3 response is not in the code. |
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Please provide 4-5 responses. |
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HI, thank you so much for your patientce. the response is the same every time. Branch: add-jk-balancer-support Branch: main |
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If I move my mpp-solar Raspberry Pi from inverter cabinet into battery container, would you get the necessary data from bluetooth? or I could try the TTL-RS485 module on there? And in my search I found this old youtube video of issues with the arduino libraries and esp32. It is old, so I dont know if it is valid. |
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Having a working setup to identify the root cause would be helpful. Please use mpp-solar to identify the supported protocol and baudrate. The YouTube video doesn't apply if your rs485 converter module doesn't have a "driver enable pin". If there is one we should care about. ;-) |
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@bobwho69 Any new here? Could you do another try with 9600 baud? |
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@bobwho69: Could you download this feature branch and flash the esp32-example.yaml to your esp32:
I've added a single query to this feature branch. Your BMS should respond if it supports the 9600 baud balancer protocol. Please provide some responses of your BMS.
Closes: #16