Unverified Commit 74b948bd authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

esp8266-bme280-outdoor: new device; configurable cal; °C; optional active mode

parent f29745f9

esp8266-bme280-outdoor/init.lua

+41 −11
Original line number Diff line number Diff line 
station_cfg = {}

station_cfg = {save=false}

dofile("wifi.lua")

mqtt_host = "mqtt.derf0.net"

mqtt_host = "mqtt.chaosdorf.space"



chip_id = string.format("%06X", node.chipid())

device_id = "esp8266_" .. chip_id

mqtt_prefix = "sensor/" .. device_id

mqttclient = mqtt.Client(device_id, 120)

sleep_time = 800



adc_mul = 469

adc_div = 102



print("https://wiki.chaosdorf.de/Sensorium")

print("ESP8266 " .. chip_id)
@@ -16,6 +20,14 @@ if node.chipid() == 3709664 then 
	gpio.write(5, 1)

	gpio.write(6, 1)

	i2c.setup(0, 1, 2, i2c.SLOW)

elseif node.chipid() == 6586591 then

	adc_mul = 467

	adc_div = 104

	gpio.mode(6, gpio.OUTPUT)

	gpio.mode(5, gpio.OUTPUT)

	gpio.write(6, 1)

	gpio.write(5, 1)

	i2c.setup(0, 1, 2, i2c.SLOW)

else

	gpio.mode(6, gpio.OUTPUT)

	gpio.mode(5, gpio.OUTPUT)
@@ -35,7 +47,7 @@ end 
-- -> adc.read(0) / 1023 * (470 / 100) == VCC

-- -> adc.read(0) * 469 / 102 ~= VCC_mV

function get_battery_mv()

	return adc.read(0) * 469 / 102

	return adc.read(0) * adc_mul / adc_div

end



function get_battery_percent(bat_mv)
@@ -70,6 +82,16 @@ function publish_reading() 
	local bat_percent = get_battery_percent(bat_mv)

	local rssi = wifi.sta.getrssi()



	if bat_mv > 4150 then

		sleep_time = 300

	elseif bat_mv < 3600 then

		sleep_time = 1600

	elseif bat_mv < 3900 then

		sleep_time = 800

	elseif bat_mv < 4060 then

		sleep_time = 400

	end



	if T == nil then

		print("BME280 readout failed")

		local json_str = string.format('{"battery_mv":%d,"battery_percent":%d,"rssi_dbm":%d}', bat_mv, bat_percent, rssi)
@@ -81,8 +103,8 @@ function publish_reading() 


	local Tsgn = (T < 0 and -1 or 1)

	T = Tsgn*T

	local temp = string.format("%s%d.%02d", Tsgn<0 and "-" or "", T/100, T%100)

	local humi = string.format("%d.%03d", H/1000, H%1000)

	local temp = string.format("%s%d.%01d", Tsgn<0 and "-" or "", T/100, (T%100) / 10)

	local humi = string.format("%d.%01d", H/1000, (H%1000) / 100)

	local pressure = string.format("%d.%03d", P/1000, P%1000)

	local sealevel = string.format("%d.%03d", QNH/1000, QNH%1000)
@@ -106,8 +128,8 @@ end 


function hass_register()

	local hass_device = string.format('{"connections":[["mac","%s"]],"identifiers":["%s"],"model":"ESP8266","name":"Sensorium %s","manufacturer":"derf"}', wifi.sta.getmac(), device_id, chip_id)

	local hass_entity_base = string.format('"device":%s,"state_topic":"%s/data","expire_after":900', hass_device, mqtt_prefix)

	local hass_temperature = 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)

	local hass_entity_base = string.format('"device":%s,"state_topic":"%s/data","expire_after":1800', hass_device, mqtt_prefix, mqtt_prefix)

	local hass_temperature = 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)

	local hass_humidity = 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)

	local hass_pressure = string.format('{%s,"name":"Pressure","object_id":"%s_pressure","unique_id":"%s_pressure","device_class":"pressure","unit_of_measurement":"hPa","value_template":"{{value_json.pressure_hpa}}"}', hass_entity_base, device_id, device_id)

	local hass_battery = string.format('{%s,"name":"Battery","object_id":"%s_battery","unique_id":"%s_battery","device_class":"battery","unit_of_measurement":"%%","value_template":"{{value_json.battery_percent}}","entity_category":"diagnostic"}', hass_entity_base, device_id, device_id)
@@ -123,10 +145,18 @@ function hass_register() 
end



function naptime()

	if sleep_time < 40 then

		print("Waiting")

		go_to_sleep:start(true)

		local next_reading = tmr.create()

		next_reading:register(sleep_time * 1000, tmr.ALARM_SINGLE, publish_reading)

		next_reading:start()

	else

		print("Naptime")

		gpio.write(5, 0)

		gpio.write(6, 0)

	rtctime.dsleep(800 * 1000000)

		rtctime.dsleep(sleep_time * 1000000)

	end

end



go_to_sleep = tmr.create()