Drive a set of analog gauges from the UDP broadcast reports from a WeatherFlow Tempest weather station, using an ESP32 microcontroller. Current gauges are for Wind Speed (MPH), Wind Direction (cardinal heading), and Temperature (degrees F). The wind direction assumes there will be 8 LEDs, driven from an SPI output register.
The design is based the TinyPICO board. Analog outputs are created from PWM output, combined with a low pass filter. Eight LEDs are driven from through an MCP23008 GPIO chip. Two additional LED (or general purpose digital outputs) are also provided by GPIO pins on the TinyPICO. along with two digial inputs (buttons).
Power connections are J1, providing 5 to 12 volts DC, or through the USB connection on the TinyPICO.
The pcb/pdf directory provides the schematics and design layout of
the board. The pcb/gerbers directory contains the production files
to spin the PCB board.
The firmware (this repo) is built via PlatformIO and VS Code. Programming can be via the USB interfaces over over the air, by selecting the built enviroment tinypico_ota.
Settings are stored persistenly in the ESP32 EEPROM. If the system does not have a valid configuration, it will enable AP mode, broadcasting the open (no encryption or passkey) SSID WeatherFlowGauges. After connecting to the system, the system can be configured through a web broswer via http://192.168.4.1. The initial username and password is admin/temp.
System status is provided through the RBG LED on the TinyPICO board.
| LED Color | Meaning |
|---|---|
| Solid Blue | Trying to connect to Wi-Fi |
| Pulsing Green | System connected to Wi-Fi, normal operation |
| Color Wheel Cycle | Running as Wi-Fi AP, waiting for setup |
| Solid Orange | Factory reset started |
| Solid Red | Factory reset completed |
While holding down Button 1, press the Reset button. The RBD LED will turn orange, keep holding Button 1 for at least 5 seconds until the RGB LED turns red, then release. The system has now been reset back to the factory default settings.
TBD