don't send 0 values

[air-quality] / ble-mijia.sh

diff --git a/ble-mijia.sh b/ble-mijia.sh
index 016675b..908d63f 100755 (executable)
--- a/ble-mijia.sh
+++ b/ble-mijia.sh
@@ -1,16 +1,12 @@
-#!/bin/bash -e
-mac=A4:C1:38:D8:3F:9C
+#!/bin/sh -e
+mac=A4:C1:38:90:DC:63
 test ! -z "$1" && mac=$1
 
+# based on https://ndimension.design.blog/2021/12/16/reading-data-from-xiaomi-mi-temperature-and-humidity-monitor-2-lywsd03mmc/
+# find sensor with: sudo hcitool lescan
+# A4:C1:38:D8:3F:9C LYWSD03MMC
 
-gatttool -b $mac --char-write-req --handle='0x0038' --value="0100" --listen | tee /dev/stderr | grep --line-buffered value: | while read bt ; do
+gatttool -b $mac --char-write-req --handle='0x0038' --value="0100" --listen | \
+       awk 'BEGIN { OFS=","; ORS="\n" } /value:/ { print "temperature=" strtonum("0x"$7$6) / 100, "humidity=" strtonum("0x"$8), "battery=" strtonum("0x"$10$9) / 1000 ; fflush() }' | \
+       xargs -i curl --silent -XPOST 'http://10.60.0.92:8086/write?consistency=any&db=rot13' --data-binary "mijia,dc=trnjanska,mac=$mac {}"
 
-#echo "XXX[$bt]"
-
-v=$( echo $bt | awk '{ print "temperature=" strtonum("0x"$7$6) / 100, "humidity=" strtonum("0x"$8), "a=" strtonum("0x"$9), "b="strtonum("0x"$10) }' | sed 's/ /,/g' )
-
-#echo $(date +%Y-%m-%d\ %H:%M:%S) $mac $v
-
-curl --silent -XPOST 'http://10.60.0.92:8086/write?consistency=any&db=rot13' --data-binary "mijia,dc=trnjanska,mac=$mac $v"
-
-done # gattool