jannik/esp32-sensornode
1
1
Fork 0
Code Issues Pull requests Releases Wiki Activity

[DOC] add real-life battery endurance

Browse source
This commit is contained in:
Jannik Beyerstedt 2021-04-05 20:53:35 +02:00
parent 28a862681e
commit d1e4e6f17e
1 changed files with 3 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
README.md
View file

@ -26,7 +26,7 @@ tar -xzf xtensa-esp32-elf-osx-1.22.0-80-g6c4433a-5.2.0.tar.gz
rm xtensa-esp32-elf-osx-1.22.0-80-g6c4433a-5.2.0.tar.gz
```
Prepare toolchain (Debian, Ubuntu) (ubuntu devel vm):
Prepare toolchain (Debian, Ubuntu):
```
sudo apt-get install git wget make libncurses-dev flex bison gperf python python-serial
@ -82,8 +82,9 @@ You would probably have to adapt the `UPLOAD_PORT` in the `Makefile` or set it v
## Battery Life
The hardware was designed with two options to drop the battery voltage to a level, which can be fed to the ESP32: A voltage regulator or a simple diode.
A test with increased data rate (for a shorter test duration) showed, that the voltage regulator leads to a slight battery life benefit.
A test with increased data rate (for a shorter test duration) resulted in a slightly better battery life using the voltage regulator.
Using a measurement interval of 30 seconds and a WiFi connection interval of 3 minutes, the 2500mAh LiIon (3.7V) battery lasted 30 days with the diode and 36 days using the voltage regulator.
In real-world application, a battery life of about 9 months can be expected (with good WLAN reception).
The selected voltage regulator has a quite low drop-out voltage and more importantly a low leaking current during the deep-sleep phases, which have a very low current needed by the ESP32.
In comparison a diode has no leaking current at all, but a more or less fixed voltage drop.