average ten PM2.5 readings before reporting to HASS (f6d4dcb4) · Commits · derf / esp8266-nodemcu-pm1006

init.lua

+22 −11

Original line number	Diff line number	Diff line
		@@ -7,7 +7,6 @@ device_id = "esp8266_" .. chip_id
		mqtt_prefix = "sensor/" .. device_id
		mqttclient = mqtt.Client(device_id, 120)


		print("ESP8266 " .. chip_id)

		ledpin = 4
		@@ -16,6 +15,8 @@ gpio.write(ledpin, 0)

		pm1006 = require("pm1006")

		pm_values = {}

		function log_restart()
		print("Network error " .. wifi.sta.status() .. ". Restarting in 20 seconds.")
		delayed_restart:start()
		@@ -58,7 +59,16 @@ function uart_callback(data)
		print("Invalid PM1006 frame")
		return
		else
		local json_str = string.format('{"pm2_5_ugm3": %d, "rssi_dbm": %d}', pm2_5, wifi.sta.getrssi())
		table.insert(pm_values, pm2_5)
		if table.getn(pm_values) == 10 then
		local pm_sum = 0
		for i, pm_value in ipairs(pm_values) do
		pm_sum = pm_sum + pm_value
		end
		local pm_int = pm_sum / 10
		local pm_frac = pm_sum % 10
		local json_str = string.format('{"pm2_5_ugm3": %d.%d, "rssi_dbm": %d}', pm_int, pm_frac, wifi.sta.getrssi())
		pm_values = {}
		if not publishing then
		publishing = true
		gpio.write(ledpin, 0)
		@@ -70,10 +80,11 @@ function uart_callback(data)
		end
		end
		end
		end

		function hass_register()
		local hass_device = string.format('{"connections":[["mac","%s"]],"identifiers":["%s"],"model":"ESP8266 + PM1006","name":"Vindriktning %s","manufacturer":"derf"}', wifi.sta.getmac(), device_id, chip_id)
		local hass_entity_base = string.format('"device":%s,"state_topic":"%s/data","expire_after":60', hass_device, mqtt_prefix)
		local hass_entity_base = string.format('"device":%s,"state_topic":"%s/data","expire_after":90', hass_device, mqtt_prefix)
		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)
		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)

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