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decode battery voltage
[air-quality]
/
ble-mijia.sh
diff --git
a/ble-mijia.sh
b/ble-mijia.sh
index
9659e29
..
908d63f
100755
(executable)
--- a/
ble-mijia.sh
+++ b/
ble-mijia.sh
@@
-2,8
+2,11
@@
mac=A4:C1:38:90:DC:63
test ! -z "$1" && mac=$1
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 | \
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), "
a=" strtonum("0x"$9), "b="strtonum("0x"$10)
; fflush() }' | \
+ 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 {}"
xargs -i curl --silent -XPOST 'http://10.60.0.92:8086/write?consistency=any&db=rot13' --data-binary "mijia,dc=trnjanska,mac=$mac {}"