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jblance / jkbms

repo with attempts to test connectivity to JK-BMS via BLE
GNU General Public License v3.0
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Any chance to get that adapted for the serial (RS485) connection? #3

Closed riogrande75 closed 3 years ago

riogrande75 commented 4 years ago

Do you plan to add the option for grabbing data from this device via the serial RS485 port? The batteries are installed in a garden shed, BT is out of range. But there is a IP connection available. Hooking up the RS485 port on a USR TCP232 serial2eth converter would allow me to communicate to the device over IP easily.

jblance commented 4 years ago

Its possible, although this code is pretty BLE specific, ie it is BLE commands that are sent, received and decoded.

I would need to determine the serial command set to make any progress.

I am currently integrating this with the mppsolar code to make a more generic solution with a variety of protocol handlers (including serial and ble), so if the serial commands are found we'd be able to make it work between the 2.

An alternative would be a raspberry pi in the battery shed talking BLE to the BMS and IP back to the house

On Fri, 6 Nov 2020, 11:22 pm riogrande75, notifications@github.com wrote:

Do you plan to add the option for grabbing data from this device via the serial RS485 port? The batteries are installed in a garden shed, BT is out of range. But there is a IP connection available. Hooking up the RS485 port on a USR TCP232 serial2eth converter would allow me to communicate to the device over IP easily.

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riogrande75 commented 4 years ago

Well, commands seem to be very identical to the ones sent via BT (off course). Here the protocol description: http://www.mediafire.com/file/1bvfggecz5l2nba/JK-B1A24S-RS485-protocol-english.pdf/file

jblance commented 3 years ago

ok ive added this to the mpp-solar codebase, so that should allow serial comms to a JK BMS nothing to test with, so there may be some bugs that need resolving so with the latest mppsolar (0.7.9 or later) something like mpp-solar -p /dev/XXX -b 9600 -P JK485 -D should try to talk to the JKBMS over rs485 (after chnaging /dev/XXX to the correct port)

jblance commented 3 years ago

Closing this here - open an issue in the other repo for any issues with the mpp-solar rs485 code