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Daniele Viganò
be4c226955
* Add an ENV far for custom docker binding * Delay in Arduino can be customized * Fix 400 error with Arduino telemetry and Nginx This was caused by the client not waiting for a response. Also Content-Length header was bogus. * Do not crash mqtt-to-db if devices isn't proviosioned * Update READMEs
60 lines
1.5 KiB
Markdown
60 lines
1.5 KiB
Markdown
# Arduino IoT device
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A simple Arduino UNO sketch is provided in the `arduino/tempLightSensor` folder.
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The sketch reads temperature and light from sensors.
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The simple schematic is:
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The sketch does require an Ethernet shield and a bunch of libraries which are
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available as git submodules under `arduino/libraries`.
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```bash
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git submodule update --init
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```
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Be advised that some libraries (notably the `NTP` one) have been customized.
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An `ESP32` board (or similar Arduino) may be used, with some adaptions, too.
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## EEPROM
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Configuration parameters are stored and retrieved from the `EEPROM`.
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An helper sketch to update the `EEPROM` is available under
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`arduino/eeprom_prog`.
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The data stored in the `EEPROM` is:
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```c
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// Ethernet MAC address
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const byte mac[6];
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// Device serial number
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const char serial[];
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// IoT platform address and port
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struct netConfig {
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IPAddress address;
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unsigned int port;
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};
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```
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The `EEPROM` can be completely erased setting the `ERASE_FIRST` macro to `1`.
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```c
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#define ERASE_FIRST 0
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```
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## Firmware options
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The following macros are available in the firmware (to be set at compile time):
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```c
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#define DEBUG_TO_SERIAL 0 // debug on serial port
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#define USE_MQTT 1 // use mqtt protocol instead of http post
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#define USE_INTERNAL_NTP 1 // use default ntp server or the internal one
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#define TELEMETRY_DELAY 10 // second between telemetry samples
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#define AREF_VOLTAGE 3.3 // set aref voltage to 3.3v instead of default 5v
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``` |