kopia lustrzana https://github.com/SP8EBC/ParaTNC
31 wiersze
1.4 KiB
Plaintext
31 wiersze
1.4 KiB
Plaintext
Supply voltage can be applied either by miniUSB connector or +5V pin in right header. Use both metods are not allowed and
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can lead even to burning controler and/or power supply.
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PC3 - PTT (default Open Drain)
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PA4 - DAC Output - signal from controller to radio
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PC1 - ADC input - signal from radio to controller. Schould be connected via 100nF in series capacitor and 10k-10k voltage
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divider to apply 1.65V (half od 3.3V) bias on ADC input
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PA10 - UART RX
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PA9 - UART TX - This UART port of course work in TTL3.3V logic levels so You need MAX3232 or simmilar to connect to PC
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PB6 - SCL to i2c pressure sensor
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PB7 - SDA to i2c pressure sensor
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PB9 - TX line from TX20 anemometr - brown wire in original cable
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PB8 - DTR line from TX20 aneometr - green wire in original cable but it can be just permanently
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pulled down do ground via 1k resistor (ground is yellow wire in original cable).
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tx20 anemometr should be powered from positive 5V voltage
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PC6 - Dallas One Wire pin to DS termometer. Only one termometer can be used and it should be powered via separate +5V line,
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parasite power is not recommended.
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PC4 - DHT22 pin
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LEDS:
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Blue LED - DCD - lights up while controller is receiving APRS packet from radio.
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Green LED - If meteo is enabled this blinks when transmission from TX20 anemometr is correctly received.
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In 'non-meteo' mode it works as TX indicator and lights up when controler is transmitting data.
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