Differences

This shows you the differences between two versions of the page.

--- modupm [2009/03/08 00:19] – sestst
+++ modupm [2018/11/03 02:59] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
 UPM manufactures wireless thermometers and weather stations. The temperature sensors communicate via a radio protocol with the base station.
-The protocol sent from the sensors is actually a digital protocol which is AM decoded over 433.92MHz radio signal. The bit rate of the protocol is slow enough to be sampled by the microphone input of a regular PC, so this is the interface we use. All wee need is to find the decoded radio signal, adapt the level and feed it into the microphone input. The NetHome software does the rest.
+The protocol sent from the sensors is actually a digital protocol which is AM decoded over 433.92MHz radio signal. The bit rate of the protocol is slow enough to be sampled by the microphone input of a regular PC, so this is the interface we use. All we need is to find the decoded radio signal, adapt the level and feed it into the microphone input. The NetHome software does the rest.
 ===== Modifying hardware =====
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 In windows this is done from the control panel under sound settings.
-In Linux this is done with the program alsamixer. Start alsamixer from a command prompt and press F5 to see microphone settings. Use Right and left arrow to move to the "Mic Capt"-level and use up arrow to increase gain.
+In Linux this is done with the program alsamixer. Start alsamixer from a command prompt (//sudo alsamixer//) and press F5 to see microphone settings. Use Right and left arrow to move to the "Mic Capt"-level and use up arrow to increase gain.