diff --git a/README.md b/README.md
index 2a80ba2..3961b5f 100644
--- a/README.md
+++ b/README.md
@@ -425,6 +425,89 @@ You'll need Arduino desftop app 1.8.9 or later.
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+ MQ131- Sensorsportal |
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+ -2.7245 |
+ 3.3004 |
+ -1.0333 |
+ 1.7117 |
+ -1.2037 |
+ 1.6455 |
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+ MQ135 - HANWEI |
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+ -2.7268 |
+ 2.301 |
+ -2.8608 |
+ 1.8627 |
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+ -3.2819 |
+ 1.9903 |
+ -5.7015 |
+ 1.1612 |
+ -2.2119 |
+ 2.0473 |
+ -5.9682 |
+ 1.0175 |
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