From 55e4b7190fb3c59a2dcdb2cf72c0d0fde524dd98 Mon Sep 17 00:00:00 2001
From: Rene Bartsch <rene@bartschnet.de>
Date: Thu, 12 Jul 2018 15:10:07 +0200
Subject: [PATCH] PSTR() pre-processor directive added

---
 Sensor-API.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Sensor-API.md b/Sensor-API.md
index 87cf6325..dbf6d6a0 100644
--- a/Sensor-API.md
+++ b/Sensor-API.md
@@ -86,4 +86,8 @@ AddLog(LOG_LEVEL_INFO);
 snprintf_P(log_data, sizeof(log_data), PSTR(D_LOG_I2C "MPR121(%c) " D_FOUND_AT " 0x%X"), pS->id[i], pS->i2c_addr[i]);
 AddLogSerial(LOG_LEVEL_INFO);
 ```
-#### void AddLogMissed(char *sensor, uint8_t misses)
\ No newline at end of file
+#### void AddLogMissed(char *sensor, uint8_t misses)
+
+### Useful pre-processor directives
+### `PSTR("string")`
+This pre-processor directive save RAM by storing strings in flash instead of RAM
\ No newline at end of file