TempLogger is a minimalistic and simple temperature and humidity logger. All you need is arduino board (e.x. ArduinoNano) and DHT22 sensor. You can use optional HC-06 bluetooth module in order to get remote access to console of TempLogger.

TempLogger every 15 minutes measures current temperature and humidity and stores new record of data in embedded EEPROM. The record of data consists: data and time, temperature and humidity. Each record is protected by checksum against memory corruption. Because the ATmega328 eeprom is not big, there is a room only for 120 records. Old records are overriding by new data. Measurement interval is hardcoded, and can be changed easily.

Get current date and time.

gettime
2024.02.07 18:51:49

Set current date and time. Parameter format: YYYY.MM.DD hh:mm:ss

settime 2024.02.07 19:00:00
set clock ok

Get current temperature in Celsius degrees and humidity in %.

getdata
T=22.8C, Rh=57%

Get measurements statistic.

getstats
total:1429, error:0, error/total:0%

Get all records stored in internal eeprom. Fields are separated by ; (semicolon). Each record has validity flag + or -, date, time, temperature in C, humidity in %.

getrecords
+;2024.01.09;12:00:00;-6.1;66
+;2024.01.09;11:45:00;-6.4;66
+;2024.01.09;11:30:00;-7.1;67
+;2024.01.09;11:15:00;-7.6;68
+;2024.01.09;11:00:00;-8.1;69
+;2024.01.09;10:45:00;-8.6;71
+;2024.01.09;10:30:00;-9.2;73
+;2024.01.09;10:15:00;-9.5;73
+;2024.01.09;10:00:00;-9.8;75
+;2024.01.09;09:45:00;-10.5;76
...

Clear all records and clear logger

eeclear
ee cleared