Unverified Commit 3cbfab96 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

Show a plot of the past 48 readings on the right side of the OLED

parent 8e945263

src/init.lua

+15 −7
Original line number Diff line number Diff line
@@ -23,6 +23,9 @@ no_wifi_count = 0 
publish_count = 0

publishing_mqtt = false



past_pos = 1

past = {}



function connect_wifi()

	print("Connecting to ESSID " .. station_cfg.ssid)

	wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, wifi_connected)
@@ -56,17 +59,22 @@ function uart_callback(data) 
		return

	end



	local line1 = string.format("%8d ppm\n", mh_z19.co2)

	local line2 = string.format("%8d c\n", mh_z19.temp)

	local line1 = string.format("%4d ppm\n", mh_z19.co2)

	local line2 = string.format("%4d c\n", mh_z19.temp)



	past[past_pos] = (mh_z19.co2 - 400) / 64

	past[past_pos] = past[past_pos] >=  0 and past[past_pos] or  0

	past[past_pos] = past[past_pos] <= 31 and past[past_pos] or 31

	past_pos = (past_pos) % 48 + 1



	fb.print(fn, line1)

	fb.print(fn, line2)



	if have_wifi then

		fb.y = 16

		fb.x = 100

		fb.print(fn, string.format("%d", wifi.sta.getrssi()))

	else

	for i = 1, 48 do

		fb.buf[80 + i] = bit.lshift(1, 31 - (past[(past_pos + (i-2)) % 48 + 1] or 0))

	end



	if not have_wifi then

		if no_wifi_count == 5 then

			wifi.setmode(wifi.NULLMODE, false)

		end