VictronMPPT-ESPHOME

ESPHome component to monitor a Victron device via ve.direct / UART TTL

Supported devices

All Victron devices providing a ve.direct port.

Tested devices

• Victron SmartSolar MPPT 75/15
• Victron SmartSolar MPPT 100/20
• Victron SmartSolar MPPT 150/35
• Victron SmartSolar MPPT 250/70
• Victron Phoenix Inverter 12/500

Requirements

• ESPHome 2021.10 or higher.
• Generic ESP32 or ESP8266 board

Schematics

Attention: The TX voltage of the VE.Direct interface depends on the product: Some are 5V, others 3.3V!

Please measure the voltage between TX and GND. In case of a logic level of 5V you should add a voltage divider or logic level converter between the ESP and the Victron device.

                UART-TTL
┌────────────────┐                ┌──────────────────┐
│           GND o│<-------------->│o GND             │
│ Victron    TX o│--------------->│o D7   ESP32/     │
│ Charger    RX o│                │       ESP8266    │<-- GND
│            5V o│                │                  │<-- 3.3V
└────────────────┘                └──────────────────┘

# UART-TTL jack (JST-PH 2.0mm pinch)
┌─── ─────── ────┐
│                │
│ O   O   O   O  │
│GND  RX  TX VCC │
└────────────────┘

If you are unsure about to pin order please measure the voltage between GND and VCC (5V). If you measure a positive voltage you know the position of VCC and GND!

JST-PH jack

Pin	Purpose	ESP pin
1	GND	GND
2	RX
3	TX	D7 (RX)
4	5V

Installation

You can install this component with ESPHome external components feature like this:

external_components:
  - source: github://KinDR007/VictronMPPT-ESPHOME@main

uart:
  id: uart0
  tx_pin: D8  # Not used! The communication is read-only
  rx_pin: D7
  baud_rate: 19200
  rx_buffer_size: 256

victron:
  id: victron0
  uart_id: uart0

sensor:
  - platform: victron
    victron_id: victron0
    panel_voltage:
      name: "Panel voltage"
    battery_voltage:
      name: "Battery voltage"
    battery_current:
      name: "Battery current"

or just use the esp8266-example.yaml as proof of concept:

# Install esphome
pip3 install esphome

# Clone this external component
git clone https://github.com/KinDR007/VictronMPPT-ESPHOME.git
cd VictronMPPT-ESPHOME

# Create a secret.yaml containing some setup specific secrets
cat > secrets.yaml <<EOF
mqtt_host: MY_MQTT_HOST
mqtt_username: MY_MQTT_USERNAME
mqtt_password: MY_MQTT_PASSWORD

wifi_ssid: MY_WIFI_SSID
wifi_password: MY_WIFI_PASSWORD
EOF

# Validate the configuration, create a binary, upload it, and start logs
esphome run esp8266-example.yaml

The uart_id and victron_id is optional if you use a single UART / victron device. All sensors are optional.

The victron device pushs one status message per second. To reduce the update interval of the ESPHome entities please use the throttle parameter to discard some messages.

The available numeric sensors are:

• max_power_yesterday
• max_power_today
• yield_total
• yield_yesterday
• yield_today
• panel_voltage
• panel_power
• battery_voltage
• battery_voltage_2
• battery_voltage_3
• battery_current
• battery_current_2
• battery_current_3
• day_number
• charging_mode_id
• error_code
• tracking_mode_id
• load_current
• ac_out_voltage
• ac_out_current
• ac_out_apparent_power
• device_mode_id
• warning_code
• battery_temperature
• instantaneous_power
• consumed_amp_hours
• state_of_charge
• time_to_go
• depth_of_the_deepest_discharge
• depth_of_the_last_discharge
• depth_of_the_average_discharge
• number_of_charge_cycles
• number_of_full_discharges
• cumulative_amp_hours_drawn
• min_battery_voltage
• max_battery_voltage
• last_full_charge
• number_of_automatic_synchronizations
• number_of_low_main_voltage_alarms
• number_of_high_main_voltage_alarms
• number_of_low_auxiliary_voltage_alarms
• number_of_high_auxiliary_voltage_alarms
• min_auxiliary_battery_voltage
• max_auxiliary_battery_voltage
• amount_of_discharged_energy
• amount_of_charged_energy

The available text sensors are:

• charging_mode
• error
• tracking_mode
• firmware_version
• device_type
• device_mode
• warning
• alarm_condition_active
• alarm_reason
• model_description

Binary sensors:

• load_state
• relay_state

Big thanks for help to ssieb for the support!

Debugging

If this component doesn't work out of the box for your device please flash the debug-esp8266-example.yaml and create an issue providing the full ESPHome log.

esphome run debug-esp8266-example.yaml