Úprava obojsmerného merača spotreby energie s dvomi CT senzormi z Tuya na ESPHOME pre použitie v Home Assistant. Originál nie je možné integrovať do Homeassistanta - nepodporuje priamo integráciu. Cez Local Tuya je nespoľahlivé a v prípade aktuálizácie HA môže rozhranie prestať fungovať.


Použitie: napr. CT A mereanie spotreby/výroby energrie zo/do siete pred solárnym meničom, CT B merá za meničom. Monitorova výroby energie zo slnka a spotreby zo siete resp. vrátanie do siete.

Popis zariadenia:
Ingergrovaný Wifi modul: CB2S
MCU: N32G430 (odčítavanie dát z CT sensorov, meranie napätia, PF...)
Board: PJ-1203A V8
CB2S datasheet: https://developer.tuya.com/en/docs/iot/cb2s-module-datasheet?id=Kafgfsa2aaypq

Modul CB2S komunikuje s N32G430 (Tuya) cez UART rozhranie CB2S cez piny P11 a P12.

Postup úpravy:
Prahratie softwaru Tuya v CB2S na ESPHOME
Pripojte CB2S cez príslušné piny TX-RX-G-3.3V k TTL adaptéru a pripojte k PC alebo priamo do USB v PC Homeassistant serveru. V prípade PC Win je potrebný mať správny ovládač pre váš TTL adaptér ináč flashovanie neprebehne.
PIN CEN je potrebné pripojiť ku Ground pre povolenie nahrávania/flashing.

V Homeassistant prehrávate sofware cez ESP Home Builder pridaním nového zariadenia BK72xxx -> CB2S Wifi modul
Prehráte zariadenie pre základné použitie s vašimi prednastaveným wifi secreets.
Pre spustenie prehratia softwaru na CB2S je potrebné pripojiť pin CEN na Ground.

Po prehratí sofwaru a overení, že je zariadenie pripojené v ESP Home builder zariedenie už môžete odpojiť od USB TTL programátora a zapojiť štandardne do el siete pre auto pripojenie do vašej WiFi
Následne upravíte YAML kód v ESP Home builder s použitím tohto kódu, poprípade upravíte podľa svojich požiadaviek:

Hodnoty sa odčítavajú cez Datapoint výstupi, ktoré sa odčítavajú z MCU a je možné s nimi pracovať vytvorením kódu napr. sensor pre prúd, napätie, power factor, reverse current. Pomocou power factor je možné vypočítať reálnu spotrebu. Násobením prúdu napätím získate iba zdanlivý výkon - apparent power. Pre vás je dôležitý reálny výkon teda Active power = V x I x PF (PF = datapoint A: 110 / 100)

Datapoint sensors description:
Voltage = Datapoint 112
Current A = Datapoint 113
Current B = Datapoint 114
Power factor A = Datapoint 110
Power factor B = Datapoint 121
Reverse A current direction = Datapoint 102 (values 0 - normal or 1 - reverse)
Reverse B current direction = Datapoint 104 (values 0 - normal or 1 - reverse)


YAML CODE:
...
bk72xx:
board: cb2s
....
add after
...captive_portal:

-----------------------------------------------------------
uart:
tx_pin: P11
rx_pin: P10
baud_rate: 9600

tuya:

sensor:
- platform: template
id: ct_voltage_m
name: "AC Voltage"
update_interval: 2s
unit_of_measurement: V
lambda: 'return (id(ct_voltage).state / 10);'

- platform: tuya
name: "CT sensor A"
unit_of_measurement: mA
sensor_datapoint: 113
id: cta_current

- platform: tuya
name: "CT sensor B"
unit_of_measurement: mA
sensor_datapoint: 114
id: ctb_current

- platform: tuya
sensor_datapoint: 112
id: ct_voltage

- platform: tuya
sensor_datapoint: 102
id: cta_direction_status

- platform: tuya
sensor_datapoint: 104
id: ctb_direction_status

- platform: tuya
name: "CT Power factor"
sensor_datapoint: 121
id: ct_pf

- platform: tuya
name: "CT Power factor A"
sensor_datapoint: 110
id: ct_pfa

- platform: template
id: cta_power
name: "CT_A Power"
update_interval: 2s
unit_of_measurement: Wh
lambda: 'return ( (id(cta_current).state /1000) * id(ct_voltage_m).state ) * ((id(ct_pfa).state)/100);'
device_class: energy
state_class: "measurement"

- platform: template
id: ctb_power
name: "CT_B Power"
update_interval: 2s
unit_of_measurement: Wh
lambda: 'return ((id(ctb_current).state /1000) * id(ct_voltage_m).state) * (id(ct_pf).state/100);'
device_class: energy
state_class: "measurement"

# CT status 1 = reverse energy flow
- platform: template
id: ct1_direction
name: "CT_A Energy direction"
update_interval: 2s
lambda: 'return id(cta_direction_status).state;'

- platform: template
id: ct2_direction
name: "CT_B Energy direction"
update_interval: 2s
lambda: 'return id(ctb_direction_status).state;'

- platform: template
id: cta_reverse_energy
name: "CT_A reverse energy"
update_interval: 2s
unit_of_measurement: Wh
device_class: energy
state_class: "measurement"
lambda: |-
if(id(cta_direction_status).state == 1) {
return(id(cta_power).state) * (id(ct_pf).state/100);
}
else {
return(0);
}

- platform: template
id: ctb_reverse_energy
name: "CT_B reverse energy"
update_interval: 2s
unit_of_measurement: Wh
device_class: energy
state_class: "measurement"
lambda: |-
if(id(ctb_direction_status).state == 1) {
return(id(ctb_power).state * (id(ct_pf).state/100));
}
else {
return(0);
}

- platform: total_daily_energy
name: "Total Daily Consumption CT A"
power_id: cta_power
unit_of_measurement: "kWh"
device_class: energy
state_class: total_increasing
# Optional: filters to convert W to kW
filters:
- multiply: 0.001

- platform: total_daily_energy
name: "Total Daily Consumption CT B"
power_id: ctb_power
unit_of_measurement: "kWh"
device_class: energy
state_class: total_increasing
# Optional: filters to convert W to kW
filters:
- multiply: 0.001

- platform: total_daily_energy
name: "Total Daily Reverse energy CT A"
power_id: cta_reverse_energy
unit_of_measurement: "Wh"
device_class: energy
state_class: total_increasing

- platform: total_daily_energy
name: "Total Daily Reverse energy CT B"
power_id: ctb_reverse_energy
unit_of_measurement: "Wh"
device_class: energy
state_class: total_increasing

time:
- platform: homeassistant
id: homeassistant_time

button:
- platform: restart
name: "Restart device"

-----------------------------------------------------------