station_cfg = {} publishing_mqtt = false publishing_http = false watchdog = tmr.create() push_timer = tmr.create() chip_id = string.format("%06X", node.chipid()) device_id = "esp8266_" .. chip_id mqtt_prefix = "sensor/" .. device_id mqttclient = mqtt.Client(device_id, 120) dofile("config.lua") print("ESP8266 " .. chip_id) ledpin = 4 gpio.mode(ledpin, gpio.OUTPUT) gpio.write(ledpin, 0) sen5x = require("sen5x") i2c.setup(sen5x.bus_id, 2, 1, i2c.SLOW) function log_restart() print("Network error " .. wifi.sta.status()) end function setup_client() print("Connected") gpio.write(ledpin, 1) if not sen5x.start() then print("SEN5x initialization error") end publishing_mqtt = true mqttclient:publish(mqtt_prefix .. "/state", "online", 0, 1, function(client) publishing_mqtt = false push_timer:start() prepare_push_data() end) end function connect_mqtt() print("IP address: " .. wifi.sta.getip()) print("Connecting to MQTT " .. mqtt_host) mqttclient:on("connect", prepare_hass_register) mqttclient:on("offline", log_restart) mqttclient:lwt(mqtt_prefix .. "/state", "offline", 0, 1) mqttclient:connect(mqtt_host) end function connect_wifi() print("WiFi MAC: " .. wifi.sta.getmac()) print("Connecting to ESSID " .. station_cfg.ssid) wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, connect_mqtt) wifi.eventmon.register(wifi.eventmon.STA_DHCP_TIMEOUT, log_restart) wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, log_restart) wifi.setmode(wifi.STATION) wifi.sta.config(station_cfg) wifi.sta.connect() end function prepare_push_data() if sen5x.prepare_read() == false then print("SEN5x error") else local delayed_read_data = tmr.create() delayed_read_data:register(20, tmr.ALARM_SINGLE, push_data) delayed_read_data:start() end end function push_data() if sen5x.read() == false then print("SEN5x error") else local json_str = "{" local influx_str = "" if sen5x.pm1 ~= nil then json_str = string.format('%s"pm1_ugm3":%d.%01d,', json_str, sen5x.pm1/10, sen5x.pm1%10) influx_str = string.format("%spm1_ugm3=%d.%01d,", influx_str, sen5x.pm1/10, sen5x.pm1%10) end if sen5x.pm2_5 ~= nil then json_str = string.format('%s"pm2_5_ugm3":%d.%01d,', json_str, sen5x.pm2_5/10, sen5x.pm2_5%10) influx_str = string.format("%spm2_5_ugm3=%d.%01d,", influx_str, sen5x.pm2_5/10, sen5x.pm2_5%10) end if sen5x.pm4 ~= nil then json_str = string.format('%s"pm4_ugm3":%d.%01d,', json_str, sen5x.pm4/10, sen5x.pm4%10) influx_str = string.format("%spm4_ugm3=%d.%01d,", influx_str, sen5x.pm4/10, sen5x.pm4%10) end if sen5x.pm10 ~= nil then json_str = string.format('%s"pm10_ugm3":%d.%01d,', json_str, sen5x.pm10/10, sen5x.pm10%10) influx_str = string.format("%spm10_ugm3=%d.%01d,", influx_str, sen5x.pm10/10, sen5x.pm10%10) end if sen5x.humidity ~= nil then json_str = string.format('%s"humidity_relpercent":%d.%01d,', json_str, sen5x.humidity/100, (sen5x.humidity%100)/10) influx_str = string.format("%shumidity_relpercent=%d.%01d,", influx_str, sen5x.humidity/100, (sen5x.humidity%100)/10) end if sen5x.temperature ~= nil then json_str = string.format('%s"temperature_celsius":%d.%01d,', json_str, sen5x.temperature/200, (sen5x.temperature%200)/20) influx_str = string.format("%stemperature_celsius=%d.%01d,", influx_str, sen5x.temperature/200, (sen5x.temperature%200)/20) end if sen5x.voc ~= nil then json_str = string.format('%s"voc":%d.%01d,', json_str, sen5x.voc/10, sen5x.voc%10) influx_str = string.format("%svoc=%d.%01d,", influx_str, sen5x.voc/10, sen5x.voc%10) end if sen5x.nox ~= nil then json_str = string.format('%s"nox":%d.%01d,', json_str, sen5x.nox/10, sen5x.nox%10) influx_str = string.format("%snox=%d.%01d,", influx_str, sen5x.nox/10, sen5x.nox%10) end json_str = string.format('%s"rssi_dbm":%d}', json_str, wifi.sta.getrssi()) influx_str = string.format("%srssi_dbm=%d", influx_str, wifi.sta.getrssi()) if not publishing_mqtt then watchdog:start(true) publishing_mqtt = true gpio.write(ledpin, 0) mqttclient:publish(mqtt_prefix .. "/data", json_str, 0, 0, function(client) publishing_mqtt = false if influx_url and influx_attr and influx_str then publish_influx(influx_str) else gpio.write(ledpin, 1) collectgarbage() end end) end end end function publish_influx(payload) if not publishing_http then publishing_http = true http.post(influx_url, influx_header, "sen5x" .. influx_attr .. " " .. payload, function(code, data) publishing_http = false gpio.write(ledpin, 1) collectgarbage() end) end end function prepare_hass_register() sen5x.prepare_get_product() local delayed_hass_register = tmr.create() delayed_hass_register:register(20, tmr.ALARM_SINGLE, hass_register) delayed_hass_register:start() end function hass_register() local product_name = sen5x.get_product() if product_name then print("Registering " .. product_name) else product_name = "SEN5x" end local hass_device = string.format('{"connections":[["mac","%s"]],"identifiers":["%s"],"model":"ESP8266 + %s","name":"%s %s","manufacturer":"derf"}', wifi.sta.getmac(), device_id, product_name, product_name, chip_id) local hass_entity_base = string.format('"device":%s,"state_topic":"%s/data","expire_after":120', hass_device, mqtt_prefix) local publish_queue = {} local hass_pm1 = string.format('{%s,"name":"PM1.0","object_id":"%s_pm1","unique_id":"%s_pm1","device_class":"pm1","unit_of_measurement":"µg/m³","value_template":"{{value_json.pm1_ugm3}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/pm1/config", hass_pm1}) local hass_pm2_5 = string.format('{%s,"name":"PM2.5","object_id":"%s_pm2_5","unique_id":"%s_pm2_5","device_class":"pm25","unit_of_measurement":"µg/m³","value_template":"{{value_json.pm2_5_ugm3}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/pm2_5/config", hass_pm2_5}) local hass_pm4 = string.format('{%s,"name":"PM4.0","object_id":"%s_pm4","unique_id":"%s_pm4","device_class":"pm25","unit_of_measurement":"µg/m³","value_template":"{{value_json.pm4_ugm3}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/pm4/config", hass_pm4}) local hass_pm10 = string.format('{%s,"name":"PM10","object_id":"%s_pm1*","unique_id":"%s_pm10","device_class":"pm10","unit_of_measurement":"µg/m³","value_template":"{{value_json.pm10_ugm3}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/pm10/config", hass_pm10}) if product_name ~= "SEN50" then local hass_temp = string.format('{%s,"name":"Temperature","object_id":"%s_temperature","unique_id":"%s_temperature","device_class":"temperature","unit_of_measurement":"°c","value_template":"{{value_json.temperature_celsius}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/temperature/config", hass_temp}) local hass_humi = string.format('{%s,"name":"Humidity","object_id":"%s_humidity","unique_id":"%s_humidity","device_class":"humidity","unit_of_measurement":"%%","value_template":"{{value_json.humidity_relpercent}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/humidity/config", hass_humi}) local hass_voc = string.format('{%s,"name":"VOC","object_id":"%s_voc","unique_id":"%s_voc","unit_of_measurement":"VOC","icon":"mdi:air-filter","value_template":"{{value_json.voc}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/voc/config", hass_voc}) end if product_name == "SEN55" then local hass_nox = string.format('{%s,"name":"NOx","object_id":"%s_nox","unique_id":"%s_nox","unit_of_measurement":"NOx","icon":"mdi:molecule","value_template":"{{value_json.nox}}"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/nox/config", hass_nox}) end local hass_rssi = string.format('{%s,"name":"RSSI","object_id":"%s_rssi","unique_id":"%s_rssi","device_class":"signal_strength","unit_of_measurement":"dBm","value_template":"{{value_json.rssi_dbm}}","entity_category":"diagnostic"}', hass_entity_base, device_id, device_id) table.insert(publish_queue, {"homeassistant/sensor/" .. device_id .. "/rssi/config", hass_rssi}) hass_mqtt(publish_queue) end function hass_mqtt(queue) local table_n = table.getn(queue) if table_n > 0 then local topic = queue[table_n][1] local message = queue[table_n][2] table.remove(queue) mqttclient:publish(topic, message, 0, 1, function(client) hass_mqtt(queue) end) else collectgarbage() setup_client() end end watchdog:register(90 * 1000, tmr.ALARM_SEMI, node.restart) push_timer:register(20 * 1000, tmr.ALARM_AUTO, prepare_push_data) watchdog:start() connect_wifi()