diff options
| author | Birte Kristina Friesel <derf@finalrewind.org> | 2024-01-11 21:01:52 +0100 |
|---|---|---|
| committer | Birte Kristina Friesel <derf@finalrewind.org> | 2024-01-11 21:01:52 +0100 |
| commit | 3cbfab96b3135cd39c1139d41fb731c76dca0165 (patch) | |
| tree | fe0f0ec1279cdfe6ff1fedf0907ecc342957b396 | |
| parent | 8e94526355a6ae290f78f21b93bb735c55b8aa04 (diff) | |
Show a plot of the past 48 readings on the right side of the OLED
| -rw-r--r-- | src/init.lua | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/src/init.lua b/src/init.lua index fd9c31d..b88ee16 100644 --- a/src/init.lua +++ b/src/init.lua @@ -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 |