Add new range of JK BMS (JK-PB) support

See #390

.github/workflows/ci.yaml

@@ -185,6 +185,9 @@ jobs:
           esphome -s external_components_source components config esp32-ble-example-multiple-devices.yaml
           esphome -s external_components_source components config esp32-ble-uart-hybrid-example.yaml
           esphome -s external_components_source components config esp32-ble-v11-example.yaml
+      - name: Compile esp32 (modbus) example configurations
+        run: |
+          esphome config esp32-jk-pb-modbus-example.yaml
 
       - name: Write yaml-snippets/secrets.yaml
         shell: bash
@@ -249,3 +252,6 @@ jobs:
         run: |
           esphome -s external_components_source components compile esp32-ble-example-faker.yaml
           esphome -s external_components_source components compile esp32-ble-v11-example.yaml
+      - name: Compile esp32 (modbus) example configurations
+        run: |
+          esphome compile esp32-jk-pb-modbus-example.yaml

esp32-jk-pb-modbus-example.yaml

@@ -0,0 +1,71 @@
+substitutions:
+  name: jk-bms
+  device_description: "Monitor a JK-BMS (JK-PB series) via Modbus"
+  external_components_source: github://syssi/esphome-jk-bms@main
+  tx_pin: GPIO16
+  rx_pin: GPIO17
+
+esphome:
+  name: ${name}
+  comment: ${device_description}
+  project:
+    name: "syssi.esphome-jk-bms"
+    version: 1.5.0
+
+esp32:
+  board: wemos_d1_mini32
+  framework:
+    type: esp-idf
+
+wifi:
+  ssid: !secret wifi_ssid
+  password: !secret wifi_password
+
+ota:
+
+logger:
+  level: DEBUG
+
+# If you use Home Assistant please remove this `mqtt` section and uncomment the `api` component!
+# The native API has many advantages over MQTT: https://esphome.io/components/api.html#advantages-over-mqtt
+mqtt:
+  broker: !secret mqtt_host
+  username: !secret mqtt_username
+  password: !secret mqtt_password
+  id: mqtt_client
+
+# api:
+
+uart:
+  - id: uart_0
+    baud_rate: 115200
+    rx_buffer_size: 384
+    tx_pin: ${tx_pin}
+    rx_pin: ${rx_pin}
+
+modbus:
+  id: modbus0
+
+modbus_controller:
+  - id: bms0
+    # Address of the Modbus slave device on the bus
+    address: 0x01
+    modbus_id: modbus0
+    setup_priority: -10
+    update_interval: 5s
+    command_throttle: 50ms
+
+sensor:
+  # 0x1200 index 0x90 Battery Voltage
+  - platform: modbus_controller
+    modbus_controller_id: bms0
+    name: "${name} total voltage"
+    address: 0x1290
+    register_type: holding
+    value_type: U_DWORD_R
+    unit_of_measurement: "V"
+    device_class: voltage
+    state_class: measurement
+    accuracy_decimals: 3
+    filters:
+      - multiply: 0.001