Which port to use? B2A8S20P provides RS485 and GPS/UART-TTL

syssi / esphome-jk-bms

ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE

Apache License 2.0

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Which port to use? B2A8S20P provides RS485 and GPS/UART-TTL #188

Closed claib closed 2 years ago

claib commented 2 years ago

hi there got a brand new B2A8S20P which has 2 Ports : RS485 (3 Pin ) and GPS ( 4 Pin ) which to use ? and which pins ? Both connectors do have ca 1mm pitch

best regards Christoph

syssi commented 2 years ago

Could you provide a photo of the connectors? I'm confused. ;-)

claib commented 2 years ago

grafik

claib commented 2 years ago

the RS485 Port is a 3 pin, and i'm wondering which is A, B and ground ;-)

syssi commented 2 years ago

Good question! I will ask Hankzor about some details of the new connector.

claib commented 2 years ago

i can confirm that it is the 4 port connector labeled " GPS ". The pins ( view from upside ) are: V+, TX, RX, GND it is a TTL level interface, preferably connected isolated.

syssi commented 2 years ago

The GPS (= UART-TTL) port is well tested and supported by this component. If you are looking for a short term solution you should use this port.

syssi commented 2 years ago

I talked to Hankzor BMS but didn't got infos about RS485 labeled port.

Let's close this issue for now.