voltage note

diff --git a/plugins/sigrok-decoders/caliper/__init__.py b/plugins/sigrok-decoders/caliper/__init__.py
index 65620f8e9a21b86ea51491e9f46691a128b758cc..d35913d1dab2c0dcffb81374eac558f8a70ea66d 100644 (file)
--- a/plugins/sigrok-decoders/caliper/__init__.py
+++ b/plugins/sigrok-decoders/caliper/__init__.py
@@ -20,6 +20,10 @@
 '''
 This decodes digital output of cheap generic calipers (usualy made in china)
 Decoder will show measured value in milimeters or inches.
+
+Please note that these devices often communicate on low voltage level,
+which might not be possible to capture with 3.3V logic analyzers.
+So additional circuitry might be needed to capture the signal.
 '''
 
 from .pd import Decoder