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Hi, This is not for OCV or totally rest calibration. It is current calibration for JK to measure correctly! Both current and voltage are needed for Coulomb counting to work effectively. What I am focusing on is how to make JK work most effectively! Best!

In my case i use esp32-s2 lolin and a tja1050 and it worked smoothly with deye and luxpower without even the 120 Ohm resister. I made prototype and have them work stably in 5 locations for 2 months by now!

Hi All, I have recently purchased a JKBD6A20S10P and I built an esphome interface using syssi configuration using esp32lolin. However, the JKBMS does not response to querry command via UAR TTL. This happened with my friend version too (11.28 and 11.36, mine is 11.42). I think JK has changed the...

I run several esp32s2lolin and have no problem with OTA until now: OTA: - port: 8266 Instead of using dhcp, I set manual Ip or bind ip to mac at router so the esp32 will always have fix address. I used 'use_address: ip_address_of_mydevice >> all working fine. I run tens of esp32lolin in ten...

I have injected a mcp2515 to capture can mesage and found out that inverter only send 1 can mesage for acknoledgement and does not send back anything at all! Messages on the bus are sent by the battery mostly!

I did correctly and the same esp worked with all other older versions but surely not working with 11.42 and 11.36. for the 11.28 i need to check the correct photo of the app about box for now (may be a mistake, coz it happened in November 2023.)

I did swapping the pin and it just dont work! I make a PCB ready and that PCB with JST 1.25 mm worked on previous JKBMS. However, I did change the pin reversely TX <-> RX (VBAT and GND stay the same, two outer pins). But nothing really work then! Haiza, that why I thought they change the command...

My Inverter prefer fix charge voltage. I observed some dedicated BMS shipped with whole pack of high quality battery over months connected to the inverter via Rs485 and it only applies a single voltage 56V during the charging and sometime does resetting SOC by trying to lengthen the charging...

Hi, thanks for your response. Sorry for providing lack of information, I connected my Esp32S2 Lolin with JK via UART-TTL (using the gps port connect TX/RX directly to my ESP board). This type of connnection worked well with JKBMS with software version sold before November 2023 (~ prior to 11.28)...

Yap, it was very strange as the code worked (the Mr.Pablo one) on the SNA6K version, but the same code failed on the SNA5000. I tried a few options but it was too late, no more solar today. Will try tomorrow on 0x356 and 0x351 to report lower voltage for checking what has happened!

You are totally right! That is why we are here with Pablo and other working hard to find a solution for this! What we are doing is making the JK work better as we can expect it to function perfectly! I myself believe current limit and voltage limit are two feasible options then!

on JK OVP is 3.55V, current limit for charge 100A, discharge 100A but I have addition layer of limits on esphome with max_cell_protection of 3450mV and Charge current limit of 70A. On SNA, Charge limit is 100A but it listened to the BMS via CAN, Voltage was 57.4 (default set for lead acid and...

Once you changed the details for the MQTT of the build firmware, you need o clean MQTT, in some cases you also need to remove the device under MQTT add-on and/or the last step (may not need but can be last resource) is to restart MQTT server. Regarding your Can bus problem. Please check to see...