Hi,
Has anyone came across AEM1000 (Environmental monitoring box from ASAIR)? This is basically a environmental monitoring box capable of sensing temperature, humidity, VOC, CO2 and PM2.5. The datasheet states communication through RS485/UART based on standard Modbus RTU. However, the direct UART is not available buy default I think. So, I tried to connect through RS485 transceiver module following esphome Modbus controller guide. But was not able to make it work. Is there any thing I am missing? Any help is greatly appreciated. Below is my current configuration.
---
###################################################
# Substitutions variables
###################################################
substitutions:
devicename: aem1000
friendly_name: Aem1000 Test
device_description: "Senses Indoor Environment"
project_version: "1.0.0"
loglevel: DEBUG
###################################################
# Board Configuration
###################################################
esphome:
name: ${devicename}
friendly_name: ${friendly_name}
min_version: 2024.7.0
name_add_mac_suffix: true
project:
name: esphome.AEM1000
version: "${project_version}"
on_boot:
priority: 240
then:
- wait_until:
condition:
wifi.connected:
timeout: 60s
esp8266:
board: d1_mini
restore_from_flash: true
framework:
version: recommended
# Enable logging
logger:
level: ${loglevel} # Default logging level
baud_rate: 0 # Disable logging over UART
api:
reboot_timeout: 0s
encryption:
key: !secret api_encryption_key
wifi:
networks:
- ssid: !secret wifi_ssid
password: !secret wifi_password
# manual_ip:
# static_ip: 192.168.0.59
# gateway: 192.168.0.1
# subnet: 255.255.255.0
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "${devicename}"
# The captive portal is a fallback mechanism for when connecting to the configured WiFi fails.
# https://esphome.io/components/captive_portal.html
captive_portal:
# Allow provisioning WiFi via serial
# improv_serial:
# Allow Over-The-Air updates
ota:
- platform: esphome
id: ota_esphome
safe_mode:
reboot_timeout: 10min
num_attempts: 5
# To have a "next url" for improv serial
# web_server:
# RTC time update
time:
- platform: homeassistant
button:
- platform: restart
name: "Restart - ${friendly_name}"
id: reboot_trigger
entity_category: config
###################################################
# UART configuration for AEM1000
###################################################
uart:
id: uart_bus
tx_pin: TX
rx_pin: RX
baud_rate: 9600
modbus:
uart_id: uart_bus
id: modbus1
modbus_controller:
- id: modbus_device
address: 0x01 ## address of the Modbus slave device on the bus
modbus_id: modbus1
setup_priority: -10
# Sensor definitions
sensor:
- platform: modbus_controller
modbus_controller_id: modbus_device
register_type: read
address: 0x0000
value_type: U_WORD
id: aem1000_temperature
name: "AEM1000 Temperature"
unit_of_measurement: "°C"
accuracy_decimals: 1
# filters:
# - lambda: |-
# return x * 0.1;
- platform: modbus_controller
modbus_controller_id: modbus_device
register_type: read
address: 0x0001
value_type: U_WORD
id: aem1000_humidity
name: "AEM1000 Humidity"
unit_of_measurement: "%"
accuracy_decimals: 1
# filters:
# - lambda: |-
# return x * 0.1;
- platform: modbus_controller
modbus_controller_id: modbus_device
register_type: read
address: 0x0002
value_type: U_WORD
id: aem1000_voc
name: "AEM1000 VOC"
unit_of_measurement: "ppm"
accuracy_decimals: 1
- platform: modbus_controller
modbus_controller_id: modbus_device
register_type: read
address: 0x0003
value_type: U_WORD
id: aem1000_co2
name: "AEM1000 CO2"
unit_of_measurement: "ppm"
accuracy_decimals: 1
- platform: modbus_controller
modbus_controller_id: modbus_device
register_type: read
address: 0x0004
value_type: U_WORD
id: aem1000_pm25
name: "AEM1000 PM2.5"
unit_of_measurement: "µg/m³"
accuracy_decimals: 1
