/TempLogger

Temperature and humidity logger based on Arduino

Primary LanguageC++MIT LicenseMIT

TempLogger

What is it ?

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

Diagram

Connection diagram

How does it work ?

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.

Console

List of available commands

Command Description
gettime Get current date and time.
settime Set current date and time.
getdata Get current measurments.
getstats Get measurement statistics.
getrecords Get all records stored in internal eeprom.
eeclear Clear all records.
eedump Dump internal eeprom for debugging purposes.

gettime

Get current date and time.

Sample usage

gettime
2024.02.07 18:51:49

settime

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

Sample usage

settime 2024.02.07 19:00:00
set clock ok

getdata

Get current temperature in Celsius degrees and humidity in %.

Sample usage

getdata
T=22.8C, Rh=57%

getstats

Get measurements statistic.

Sample usage

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

getrecords

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 %.

Sample usage

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
...

eeclear

Clear all records and clear logger

Sample usage

eeclear
ee cleared