diff --git a/examples/m5atom/platformio.ini b/examples/m5atom/platformio.ini
index a5430515..3604fe91 100644
--- a/examples/m5atom/platformio.ini
+++ b/examples/m5atom/platformio.ini
@@ -23,4 +23,4 @@ build_flags =
 lib_deps =
     hpsaturn/CanAirIO Air Quality Sensors Library @ 0.7.4
     fastled/FastLED@^3.5.0
-    m5stack/M5Atom@^0.0.7
+    m5stack/M5Atom@^0.1.2
diff --git a/library.json b/library.json
index 579886ff..019c2b11 100644
--- a/library.json
+++ b/library.json
@@ -1,6 +1,6 @@
 {
   "name": "CanAirIO Air Quality Sensors Library",
-  "version": "0.7.4",
+  "version": "0.7.5",
   "homepage":"https://canair.io",
   "keywords": 
   [ 
@@ -86,7 +86,7 @@
     {"name":"AM232X", "owner":"robtillaart", "version":"0.5.0"},
     {"name":"sps30", "owner":"paulvha","version":"1.4.17"},
     {"name":"MH-Z19", "owner":"wifwaf", "version":"1.5.4"},
-    {"name":"S8_UART", "owner":"jcomas", "version":"1.0.1"},
+    {"name":"S8_UART", "owner":"jcomas", "version":"1.0.2"},
     {"name":"Sensirion Core","owner":"sensirion","version":"0.6.0"},
     {"name":"Sensirion I2C SCD4x","owner":"sensirion","version":"0.4.0"},
     {"name":"Sensirion I2C SEN5X","owner":"sensirion","version":"0.3.0"},
diff --git a/library.properties b/library.properties
index 821d61ac..fe026e74 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=CanAirIO Air Quality Sensors Library
-version=0.7.4
+version=0.7.5
 author=@hpsaturn, CanAirIO project <info@canair.io>
 maintainer=Antonio Vanegas <hpsaturn@gmail.com>
 url=https://github.com/kike-canaries/canairio_sensorlib
diff --git a/src/Sensors.cpp b/src/Sensors.cpp
index d156d88b..d4a729d8 100644
--- a/src/Sensors.cpp
+++ b/src/Sensors.cpp
@@ -1970,6 +1970,9 @@ void Sensors::startI2C() {
   Wire.begin(I2C1_SDA_PIN, I2C1_SCL_PIN);
   enableWire1();
 #endif
+#ifdef ESP32C3_AIRGRADIENT
+  Wire.begin(7, 6);
+#endif
 }
 
 void Sensors::enableWire1() {
@@ -2006,36 +2009,16 @@ bool Sensors::serialInit(u_int pms_type, unsigned long speed_baud, int pms_rx, i
   if (devmode)
     Serial.printf("-->[SLIB] UART init with speed\t: %lu TX:%i RX:%i\r\n", speed_baud, pms_tx,
                   pms_rx);
+#if ARDUINO_USB_CDC_ON_BOOT  // Serial used for USB CDC
+  Serial0.begin(9600, SERIAL_8N1);
+  _serial = &Serial0;
+  return true;
+#endif
   switch (SENSOR_COMMS) {
     case SERIALPORT:
       Serial.begin(speed_baud);
       _serial = &Serial;
       break;
-#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) || defined(SAMD21G18A) || \
-    defined(ARDUINO_SAM_DUE)
-    case SERIALPORT1:
-      Serial1.begin(speed_baud);
-      _serial = &Serial1;
-      break;
-#endif
-#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) || defined(ARDUINO_SAM_DUE)
-    case SERIALPORT2:
-      Serial2.begin(speed_baud);
-      _serial = &Serial2;
-      break;
-
-    case SERIALPORT3:
-      Serial3.begin(speed_baud);
-      _serial = &Serial3;
-      break;
-#endif
-#if defined(__AVR_ATmega32U4__)
-    case SERIALPORT1:
-      Serial1.begin(speed_baud);
-      _serial = &Serial1;
-      break;
-#endif
-
 #if defined(ARDUINO_ARCH_ESP32)
     // on a Sparkfun ESP32 Thing the default pins for serial1 are used for acccessing flash memory
     // you have to define different pins upfront in order to use serial1 port.
diff --git a/src/Sensors.hpp b/src/Sensors.hpp
index e55937df..e4047548 100644
--- a/src/Sensors.hpp
+++ b/src/Sensors.hpp
@@ -24,8 +24,8 @@
 #include <dht_nonblocking.h>
 #endif
 
-#define CSL_VERSION "0.7.4"
-#define CSL_REVISION 383
+#define CSL_VERSION "0.7.5"
+#define CSL_REVISION 384
 
 /***************************************************************
  * S E T U P   E S P 3 2   B O A R D S   A N D   F I E L D S
@@ -69,6 +69,9 @@
 #elif ESP32C3
 #define PMS_RX 20
 #define PMS_TX 21
+#elif ESP32C3_AIRGRADIENT
+#define PMS_RX 0
+#define PMS_TX 1
 
 #else              // **DEFAULT** for legacy CanAirIO devices:
 #define PMS_RX 17  // D1MIN1 / TTGOT7 / ESP32DEVKIT, also for main ESP32 dev boards use it
diff --git a/unified-lib-deps.ini b/unified-lib-deps.ini
index c649e8ae..c3ab3788 100644
--- a/unified-lib-deps.ini
+++ b/unified-lib-deps.ini
@@ -10,7 +10,7 @@ lib_deps =
   robtillaart/AM232X@0.5.0
   paulvha/sps30@1.4.17
   wifwaf/MH-Z19@1.5.4
-  jcomas/S8_UART@1.0.1
+  jcomas/S8_UART@1.0.2
   sensirion/Sensirion Core@0.6.0
   sensirion/Sensirion I2C SCD4x@0.4.0
   sensirion/Sensirion I2C SEN5X @ 0.3.0