https://github.com/pilotak/usb-temp-switch
ATtiny85 temperature & humidity sensor + switch with USB serial control
https://github.com/pilotak/usb-temp-switch
arduino attiny85 dht22 humidity-sensor serialport temperature-sensor usb
Last synced: about 2 months ago
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ATtiny85 temperature & humidity sensor + switch with USB serial control
- Host: GitHub
- URL: https://github.com/pilotak/usb-temp-switch
- Owner: pilotak
- License: mit
- Created: 2020-07-16T11:05:10.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2020-07-23T20:27:55.000Z (almost 6 years ago)
- Last Synced: 2025-06-10T12:49:16.880Z (about 1 year ago)
- Topics: arduino, attiny85, dht22, humidity-sensor, serialport, temperature-sensor, usb
- Language: C++
- Homepage:
- Size: 5.86 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# USB temperature & switch
ATtiny85 based USB temperature sensor & humidity (DHT22) and low side switch with serial control
# Install
## Version 1
You need an AVR programmer (ICSP), for how to make one please follow version 2 below (skip the "Burn bootloader")
Upload directly via PlatformIO
```sh
pio run -t upload -e usb_temp_switch_v1
```
or use compiled/downloaded FW with `AVRDUDE` _(don't forget to change the serial port number & fw path)_
```sh
avrdude -v -p attiny85 -c arduino -b 19200 -P COM1 -e -D -U flash:w:firmware.hex:i
```
## Version 2
This HW revision uses an Optiboot bootloader which enables you to upload upgrades via USB.
- install Arduino IDE
- install (ATTinyCore)[https://github.com/SpenceKonde/ATTinyCore]
- follow (this tutorial)[https://create.arduino.cc/projecthub/Oniichan_is_ded/learn-how-to-program-attiny85-and-attiny13a-167359] in order to make your Arduino UNO as an AVR programmer
- connect the ATtiny85 to your programmer from above
- "Burn bootloader" through Arduino IDE
You can now upload directly via PlatformIO
```sh
pio run -t upload -e usb_temp_switch_v2
```
or use compiled/downloaded FW with `AVRDUDE` _(don't forget to change the serial port number & fw path)_
```sh
avrdude -v -p attiny85 -c arduino -b 19200 -P COM1 -e -D -U flash:w:firmware.hex:i
```
# Usage
Open serial port with baud 9600, 8N1. All messages sent/recevied have a newline delimiter (`\n`)
## Switch
- to turn ON the switch send **`d=1`**
- to turn OFF the switch send **`d=0`**
You will always get a confirmation: same massage you sent
## Temperature
Once per set interval you will get a temperature with one decimal place ie.: **`t=22.1`**
## Humidity
Once per set interval you will get a humidity with one decimal place ie.: **`h=50.3`**