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ADConv
ADConv is the software for a weather station based on the ATmega8 initially
This is a continuously changing upstream version. If you want anything more stable you can fall back to v1.0, v2.0, v3.0.
- Build on a strip grid board
- Cheap and easy construction
- Using external oscillator up to 16MHz
- Connector for extensions (X Connector)
Layout
Strip-Gridboard 100x100, RM2.54
Get it
git clone -b atmega8 https://github.com/manuel-io/adconv.git
cd adconv
git checkout -b build v3.0
make
make dispatch
- Make sure you have the needed tools
- soldering station, soldering wire, wire cutter, wire, etc
- Order the construction elements
- Assemble the circuit according to the schematics
- Compile the software
- Upload the compiled code to the controller
- Start the web interface
- Use the CP2102 Breakout in order to connect the board with the PC
- use the board without serial connection, just wait until the timeout is triggered or set the DISABLE_XCON makro
- Visit http://localhost:9292 in your browser
cd adconv/share/xcon
bundle install
bundle exec bin/xconn.rb [-d device] [--no-stats] [--no-web] [-h]Construction elements
| Amount | Layout | Element | Reichelt | Amazon |
|---|---|---|---|---|
| 1 | IC1 | ATmega8 | ATMEGA 8-16 DIP | |
| 1 | Socket | GS 28 | ||
| 1 | 16MHz | Crystal | 16,0000-HC49U-S | |
| 1 | LED1 | LED Green | LED 5MM GN | |
| 1 | LED2 | LED Red | LED 5MM RT | |
| 1 | Board 100x100 | H25SR100 | ||
| 3 | R1.5k | Resistor | 1/4W 1,5K | |
| 1 | R1k | Resistor | 1/4W 1,0K | |
| 1 | LDR | Photoresistor | A 906011 | |
| 1 | PB1 | Push-Button | TASTER 3301B | |
| 1 | PB2 | Push-Button | TASTER 3301B | |
| 1 | X Connector | Plug, straight | WSL 10G | |
| 1 | SPI/ISP | Plug, angled | WSL 10W | |
| 3 | 100n | Capacitor | KERKO 100N | |
| 2 | 22p | Capacitor | KERKO 22P | |
| 1 | POT10k | Potentiometer | PO4M-LIN 10K | |
| 1 | PC1 | Pin header, female | BL 1X16G7 2,54 | |
| 1 | PC2 | Pin header, female | BL 1X05G7 2,54 | |
| 1 | Pin header, male | MPE 087-1-016 | ||
| 1 | HD44780 | Display | LCD 162C BL | 1602 LCD Module |
| 1 | DHT11 Module | DHT11 Breakout | Arduino DHT11 Module | |
| 1 | FC-28 Module | FC-28 Breakout | Arduino FC-28 Module | |
| 1 | CP2102 Breakout | CP2102 Breakout |
SPI/ISP Interface
In-System Programming allows programming and reprogramming of the microcontroller positioned inside the end system. For example, using the USBasp.
CP2102 Breakout
The CP2102 Breakout is a USB to TTL converter intended for replacing a simple serial cable.
XConn
The XConnector (Extension connector) is a general purpose plug with 9 pins including the USART data lines of the microcontroller. The default usage is a serial UART connection to another device.
| XConn | CP2102 Breakout |
|---|---|
| VCC | VCC |
| GND | GND |
| RXD | TXO |
| TXD | RXI |
| NC | DTR |
| NC | CTS |
- According to the datasheet the CP2102 chip is 5V tolerant!
- NC: Not connected.
For instance, the measured weather data can be transmitted to a Raspberry Pi, a BeagleBoard or similar. The source base includes a web interface which is ready for that scenario.
SClient
The SClient is a small program in order to simulate the behavior of a serial connected microcontroller. It just gives randomly weather data to a virtual serial interface which in turn can be analysed by the web interface.
This program exists for testing purpose:
cd adconv/share/sclient/
make
cd ../../../
socat pty,raw,echo=0,link=/tmp/ttyS20 pty,raw,echo=0,link=/tmp/ttyS21
ruby adconv/share/xconn/bin/xconn.rb
./adconv/share/sclient/sclient