Hi there.
thank you for the very good application for the Multical Optical reading.
i just have the issue, that i cant get it read from my meter.

i get this error:

if i take it of the meter it get the this error you make the troubleshooting at:

my hardware is this one here:
https://www.ebay.com/itm/354359025520?hash=item5281719f70:g:BgcAAOSwPqxjWj~H

and here is my .yaml code

`substitutions:
device_name: multical602
friendly_name: Multical 602

esphome:
name: ${device_name}
platform: ESP8266
board: esp01_1m
includes:
- kmp.h
- multical402.h

Enable logging

logger:
baud_rate: 0

Enable Home Assistant API

api:
encryption:
key: "S8FouGpCYDTCDmnP+uSO2m3/bIAChyGLBEtjORhjtFg="

ota:
password: "5050a1d09c9b1a4ad46202cc65d9aa21"

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

Enable fallback hotspot (captive portal) in case wifi connection fails

ap:
ssid: "Kamstrup-Multical"
password: "b1jzffPzfgBh"

#Multical UART
uart:

• id: uart_bus
  rx_pin: GPIO03
  tx_pin: GPIO01
  baud_rate: 1200
  data_bits: 8
  parity: NONE
  stop_bits: 1

#Multical Custom Sensor (first variable is update interval in ms; 3600000 is 1 hour)
custom_component:

• lambda: |-
  auto multical402 = new Multical402(
  10000,
  id(uart_bus),
  id(m_energy),
  id(m_power),
  id(m_tin),
  id(m_tout),
  id(m_tdiff),
  id(m_flow),
  id(m_volume));
  App.register_component(multical402);
  return {multical402};
  components:
  • id: multical

sensor:
#Multical Custom Sensors

• name: "Multical Energy"
  platform: template
  id: m_energy
  icon: "mdi:lightning-bolt"
  unit_of_measurement: MWh
  accuracy_decimals: 3
  state_class: "total_increasing"
  device_class: "energy"
  force_update: true

• name: "Multical Volume"
  platform: template
  id: m_volume
  unit_of_measurement: m3
  accuracy_decimals: 2
  state_class: "measurement"

• name: "Multical Temperature In"
  platform: template
  id: m_tin
  icon: "mdi:thermometer"
  unit_of_measurement: °C
  accuracy_decimals: 2
  state_class: "measurement"
  device_class: "temperature"

• name: "Multical Temperature Out"
  platform: template
  id: m_tout
  icon: "mdi:thermometer"
  unit_of_measurement: °C
  accuracy_decimals: 2
  state_class: "measurement"
  device_class: "temperature"

• name: "Multical Temperature Diff"
  platform: template
  id: m_tdiff
  icon: "mdi:thermometer"
  unit_of_measurement: °C
  accuracy_decimals: 2
  state_class: "measurement"
  device_class: "temperature"

• name: "Multical Power"
  platform: template
  id: m_power
  icon: "mdi:flash"
  unit_of_measurement: kW
  accuracy_decimals: 1
  state_class: "measurement"
  device_class: "power"

• name: "Multical Flow"
  platform: template
  id: m_flow
  unit_of_measurement: l/h
  accuracy_decimals: 0
  state_class: "measurement"`

i see the red IR in the sensor make the blink every 10 sec.
i have tried to rotate the eye on the meter withou luck.

can you in some way help me out here ?

BR
/Mike

Hi,

sadly the links to the schematics for the ir Implementation are broken can you provide more informations?

Sorry, this is more a question than an issue;
Does it also work with a multical 21 ? That is a Watermeter from Kamstrup that seems to have an optical diode as well.
This would be a feature request if it could be supported.
Keep up the good work, thanks

I had timeout problems on some registers with this code.

Debugging showed two gave timeout and therefore other registers didn’t come through.

Increasing timeout property in the code to 250 solved it.

Thanks for the great work 👍

Hi

the information I read from the energy register is in KWh with no decimals value.

This is not a very good resolution when energy consumption is around 5-20 KWh in the summer period.

In HA it gives this result in the energy dashboard:

But when I look at my suppliers statistics they have better resolution in my energy data:

Therefore I assume that the data is available in the Multical but not stored in the Energy register…

Any ideas which register (if any) would store more detailed energy data?

Do you have new sources to get a optical reader?