32 lines
834 B
C
32 lines
834 B
C
/* dht11main.c -- sample DHT11 sensor */
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/* Copyright (c) 2020-2021 Renaud Fivet */
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#include <stdio.h>
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#include "system.h"
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#include "dht11.h"
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int main( void) {
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static unsigned last ;
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dht11_init() ;
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for( ;;)
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if( last == uptime)
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yield() ;
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else {
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last = uptime ;
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if( 2 == (last % 5)) /* every 5 seconds starting 2s after boot */
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switch( dht11_read()) {
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case DHT11_SUCCESS:
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printf( "%u%%RH, %d.%uC\n", dht11_humid, dht11_tempc, dht11_tempf) ;
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break ;
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case DHT11_FAIL_TOUT:
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puts( "Timeout") ;
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break ;
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case DHT11_FAIL_CKSUM:
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puts( "Cksum error") ;
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}
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}
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}
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/* end of dht11main.c */
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