- Microcontroller: Atmel atmega32u4 (Arduino Leonardo)
- Power In: Micro-USB (typically supplied by Android tablet)
- Maximum Number of Flow Meters: 2
- Diagnostic LEDs: 4
External Device Compatibility¶
Flow Meters: Though we highly recommend using the KBPM with Kegbot’s very own SF800-RJ, the KBPM is compatible with flow meters that:
- Accept +5V/GND as power-in
- Report volume throughput in a series of pulses or ticks
Tablets: Any Android tablet that:
- Supports USB Host Mode
- Can successfully install the Kegbot app
KegJack (RJ45) Pinout¶
|1||Orange/White||GP0 (OneWire “A” bus)|
|3||Green/White||GP1 (OneWire “B” bus)|
The Kegbot RF800-RJ Flow Meter utilizes +5V, GND, and FLOW0 only.
- FLOW1 is available for a second flow meter
- GP0 is configured for OneWire temperature sensing (Compatibility limited to Dallas/Maxim DS18B20 and 18S20)
- GP1 is configured for OneWire authentication (e.g. iButton)
- GP2 & GP3 are currently unused.
There are four LEDs on the left side of the board. From top to bottom, they are:
- POWER: Board-level power indicator, just about the USB connector.
- RX: Serial data receive LED.
- TX: Serial data transmit LED.
- CHIP: General-purpose board LED.
The POWER LED will light up when the KBPM is connected to any power source. The CHIP LED will flash and decay on a 5-second cycle when the Kegboard firmware is listening, and on a 1.25-second cycle when the Kegboard firmware has recognized connection to a compatible Android tablet. The RX and TX LEDs will rapidly flash when the flow meter is reporting pulses or ticks.
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