diff --git a/platformio.ini b/platformio.ini
index 01b8b602..6eafff31 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -30,7 +30,7 @@ description = Paxcounter is a proof-of-concept ESP32 device for metering passeng
 
 [common]
 ; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
-release_version = 1.7.11
+release_version = 1.7.12
 ; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
 ; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
 debug_level = 3
@@ -50,6 +50,8 @@ lib_deps_rgbled =
     SmartLeds@>=1.1.3
 lib_deps_gps =
     TinyGPSPlus@>=1.0.2
+lib_deps_rtc =
+    RTC@^2.3.0
 lib_deps_basic =
     ArduinoJson@^5.13.1
     Time@>=1.5
@@ -59,6 +61,7 @@ lib_deps_all =
     ${common.lib_deps_display}
     ${common.lib_deps_rgbled}
     ${common.lib_deps_gps}
+    ${common.lib_deps_rtc}
 build_flags_basic =
     -include "src/hal/${PIOENV}.h"
     -include "src/paxcounter.conf"
@@ -212,6 +215,7 @@ lib_deps =
     ${common.lib_deps_basic}
     ${common.lib_deps_lora}
     ${common.lib_deps_display}
+    ${common.lib_deps_rtc}
 build_flags = 
     ${common.build_flags_basic}
 upload_protocol = ${common.upload_protocol}
diff --git a/src/hal/ttgofox.h b/src/hal/ttgofox.h
index 8f0a6d2d..18a8b04f 100644
--- a/src/hal/ttgofox.h
+++ b/src/hal/ttgofox.h
@@ -20,6 +20,9 @@
 #define MY_OLED_SCL (22)
 #define MY_OLED_RST U8X8_PIN_NONE
 
+// Pins for on board DS3231 RTC chip
+#define HAS_RTC MY_OLED_SDA, MY_OLED_SCL // SDA, SCL
+
 // Pins for LORA chip SPI interface, reset line and interrupt lines
 #define LORA_SCK  (5) 
 #define LORA_CS   (18)