stormwater.yaml

# Lilygo T-CAN485 v1.1 config, for an external ZTS-3000-I20-485 bridge with 1-2 submersible water level sensors

substitutions:
  sensor1_maxdepth: "1" # first sensor, max depth in metres. 
  sensor2_maxdepth: "3" # ssecond sensor, max depth in metres. 
  adc_minvalid: "655" # The ZTS-3000-I20-485 "12 bit" ADC min value for the 4-20ma sensors
  adc_maxvalid: "3276" # The ZTS-3000-I20-485 "12 bit" ADC max value for the 4-20ma sensors
  ha_encryptionkey: "yourkeyhere"
  cportal_password: "password"

esphome:
  name: esphome-web-6d4f20
  friendly_name: shed-stormwater
  on_boot: 
    - priority: 90
      then: 
      - output.turn_on: modbus_en # Enable, aka RE on the MAX13487E - Drive RE high to let the AutoDirection circuit control the receiver
      - output.turn_on: modbus_se # Not sleep, aka SHDN (shutdown) on the MAX13487E
      - output.turn_on: modbus_5v # Provide power to the modbus chip (MAX13487E)

esp32:
  board: esp32dev
  framework:
    type: arduino

# Logging level
logger:
  #level: VERBOSE

# Enable Home Assistant API
api:
  encryption:
    key: ${ha_encryptionkey}

ota:


wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esphome-Web-6D4F20"
    password: ${cportal_password}

captive_portal:

uart:
  id: mod_uart
  tx_pin: 22 
  rx_pin: 21
  baud_rate: 4800 # The out-of-box baud rate for my particular sensor->RS485 bridge
  stop_bits: 1
  parity: NONE
  data_bits: 8
#  debug:
#    direction: BOTH
#    dummy_receiver: false
#    after:
#      delimiter: "\n"
#    sequence:
#      - lambda: UARTDebug::log_string(direction, bytes);

modbus:
  id: modbus1
  uart_id: mod_uart

modbus_controller:
  - id: water
    address: 0x1   ## address of the ModBUS slave device on the bus
    modbus_id: modbus1
    setup_priority: -10

sensor:
  - platform: modbus_controller
    modbus_controller_id: water
    name: "Water Level 1"
    id: water_level_1
    register_type: holding
    address: 0x0
    unit_of_measurement: "cm"
    device_class: "distance"
    state_class: "measurement"
    accuracy_decimals: 2
    value_type: U_WORD
    lambda: |-
        //ESP_LOGI("","Lambda incoming value=%f - data array size is %d",x,data.size());
        //ESP_LOGI("","Sensor properties: address = 0x%X, offset = 0x%X value type=%d",item->start_address,item->offset,item->sensor_value_type);
        if (x < ${adc_minvalid} || isnan(x) || x > ${adc_maxvalid}) { 
          return NAN; 
        }
        return esphome::remap(x, float(${adc_minvalid}), float(${adc_maxvalid}), 0.0f, float(${sensor1_maxdepth}) * 100.0f); // 100 = centimetres
  - platform: modbus_controller
    modbus_controller_id: water
    name: "Water Level 2"
    id: water_level_2
    register_type: holding
    address: 0x1
    unit_of_measurement: "cm"
    device_class: "distance"
    state_class: "measurement"
    accuracy_decimals: 2
    value_type: U_WORD
    lambda: |-
        //ESP_LOGI("","Lambda incoming value=%f - data array size is %d",x,data.size());
        //ESP_LOGI("","Sensor properties: address = 0x%X, offset = 0x%X value type=%d",item->start_address,item->offset,item->sensor_value_type);
        if (x < ${adc_minvalid} || isnan(x) || x > ${adc_maxvalid}) { 
          return NAN;
        }
        return esphome::remap(x, float(${adc_minvalid}), float(${adc_maxvalid}), 0.0f, float(${sensor2_maxdepth}) * 100.0f); // 100 = centimetres

light:
  - platform: esp32_rmt_led_strip
    rgb_order: GRB # The correct ordering
    pin: 4
    num_leds: 1
    rmt_channel: 0
    chipset: ws2812
    name: "Light"

# These could be implemented as inverted so they didn't need explict enablement above i.e. disabled = HIGH
output:
- platform: gpio
  pin: 17
  id: modbus_en
- platform: gpio
  pin: 19
  id: modbus_se
- platform: gpio
  pin: 16
  id: modbus_5v