From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sun, 21 Feb 2021 08:29:50 +0000 (+0000)
Subject: send iio sensors to mqtt
X-Git-Url: http://git.rot13.org/?p=air-quality;a=commitdiff_plain;h=c9bfa79f7249f0963798648a565243e4a3e63161;hp=43acc200a049d872b7ce48df7bfb0a5c80818eb6

send iio sensors to mqtt
---

diff --git a/iio2mqtt.pl b/iio2mqtt.pl
new file mode 100755
index 0000000..a9dce9f
--- /dev/null
+++ b/iio2mqtt.pl
@@ -0,0 +1,40 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+
+use Time::HiRes;
+
+# sudo apt install libiio-utils mosquitto-clients
+
+my $hostname = `hostname -s`;
+chomp($hostname);
+
+while(1) {
+
+	my $t = Time::HiRes::time;
+
+	my $iio = `iio_info`;
+
+	my $device;
+	my $name;
+
+	foreach ( split(/\n/, $iio) ) {
+		if ( m/iio:device\d+:\s+(\S+)/ ) {
+			$device = $1;
+		} elsif ( m/(\S+):\s+\(input\)/ ) {
+			$name = $1;
+		} elsif ( m/attr\s+0:\s+input\svalue: (\d+[\.\d]+)/ ) {
+			my $val = $1;
+			if ( $val !~ m/\d+\.\d+/ ) {
+				$val = $val / 1000;
+			}
+			my $topic = "iio/$hostname/$device/$name";
+			#print "$topic $val\n";
+			system "mosquitto_pub -h rpi2 -t $topic -m $val";
+		} else {
+			#warn "# $_\n";
+		}
+	}
+
+	sleep Time::HiRes::time + 1 - $t;
+}
diff --git a/system/iio2mqtt.service b/system/iio2mqtt.service
new file mode 100644
index 0000000..95ebc8a
--- /dev/null
+++ b/system/iio2mqtt.service
@@ -0,0 +1,11 @@
+[Unit]
+Description=iio2mqtt
+
+[Service]
+User=dpavlin
+ExecStart=/home/dpavlin/air-quality/iio2mqtt.pl
+Restart=always
+RestartSec=2s
+
+[Install]
+WantedBy=multi-user.target