diff --git a/Include/config.h b/Include/config.h
--- a/Include/config.h
+++ b/Include/config.h
@@ -13,12 +13,14 @@
 // Transmit power (0-0x7F, 0mW - 40mw?)
 #define SI446x_POWER 0x02
 
-#define TUNE_FREQUENCY 433000000UL
+#define TUNE_FREQUENCY 433500000UL
 
 // Internal macros
 #define hal_init HAL_Init
 
 
+// Uncomment if using legacy LPS25h pressure sensor
+//#define LPS25H
 
 
 // --------------------------------------------------------------------------
@@ -44,8 +46,6 @@
 // APRS config (aprs.c)
 // --------------------------------------------------------------------------
 
-#define SI446x_POWER 0x7f
-
 // Set your callsign and SSID here. Common values for the SSID are
 // (from http://zlhams.wikidot.com/aprs-ssidguide):
 //
diff --git a/Include/pressure.h b/Include/lps25h.h
rename from Include/pressure.h
rename to Include/lps25h.h
--- a/Include/pressure.h
+++ b/Include/lps25h.h
@@ -1,5 +1,5 @@
-#ifndef PRESSURE_H
-#define PRESSURE_H
+#ifndef LPS25H_H
+#define LPS25H_H
 
 #include "stm32f0xx_hal.h"
 
@@ -23,14 +23,14 @@
 
 #define PRESSURE_CTRL1_PWRUP 0b10000000
 
-void pressure_init(void);
-void pressure_read(void);
-void pressure_updatevalues(void);
+void lps25h_init(void);
+void lps25h_read(void);
+void lps25h_updatevalues(void);
 
-int32_t pressure_gettemp(void);
-int32_t pressure_getpressure(void);
+int32_t lps25h_get_temperature(void);
+int32_t lps25h_get_pressure(void);
 
-I2C_HandleTypeDef* pressure_get_i2c_handle(void);
+I2C_HandleTypeDef* lps25h_get_i2c_handle(void);
 #endif
 
 // vim:softtabstop=4 shiftwidth=4 expandtab
diff --git a/Libraries/aprs/aprs.c b/Libraries/aprs/aprs.c
--- a/Libraries/aprs/aprs.c
+++ b/Libraries/aprs/aprs.c
@@ -24,8 +24,11 @@
 #include <stdlib.h>
 
 #include "config.h"
-//#include "pressure.h"
-#include "bme280.h"
+#ifdef LPS25H
+	#include "lps25h.h"
+#else
+	#include "bme280.h"
+#endif
 #include "aprs.h"
 #include "gps.h"
 //#include "gps.h"
@@ -80,8 +83,10 @@ void aprs_send(void)
   snprintf(tmpBuffer, 128, "%d,", gps_getdata()->altitude);
   ax25_send_string(tmpBuffer);
 
+
+#ifdef LPS25H
   // Pressure
-  snprintf(tmpBuffer, 128, "%d,", bme280_get_pressure());
+  snprintf(tmpBuffer, 128, "%d,", lps25h_get_pressure());
   ax25_send_string(tmpBuffer);
   
   // Temperature
@@ -89,8 +94,22 @@ void aprs_send(void)
   ax25_send_string(tmpBuffer);
 
   // Humidity
+  snprintf(tmpBuffer, 128, "0,");
+  ax25_send_string(tmpBuffer);
+
+#else
+  // Pressure
+  snprintf(tmpBuffer, 128, "%d,", bme280_get_pressure());
+  ax25_send_string(tmpBuffer);
+
+  // Temperature
+  snprintf(tmpBuffer, 128, "%d,", bme280_get_temperature());
+  ax25_send_string(tmpBuffer);
+
+  // Humidity
   snprintf(tmpBuffer, 128, "%d,", bme280_get_humidity());
   ax25_send_string(tmpBuffer);
+#endif
 
   // HDOP
   snprintf(tmpBuffer, 128, "%u,", gps_getdata()->pdop);
diff --git a/Source/pressure.c b/Source/lps25h.c
rename from Source/pressure.c
rename to Source/lps25h.c
--- a/Source/pressure.c
+++ b/Source/lps25h.c
@@ -2,7 +2,7 @@
 // Sensors: Reads pressure and e-compass sensors over I2C and stores readings in queryable internal data structures
 //
 
-#include "pressure.h"
+#include "lps25h.h"
 #include "stm32f0xx_hal.h"
 
 
@@ -20,7 +20,7 @@ static uint8_t sensors_pressure_freshdat
 
 
 // Initialize pressure sensor and E-compass
-void pressure_init(void)
+void lps25h_init(void)
 {
 	GPIO_InitTypeDef GPIO_InitStruct;
 
@@ -63,7 +63,7 @@ void pressure_init(void)
 
 
 // Initiate interrupt-based read of engineering sensors
-void pressure_read(void)
+void lps25h_read(void)
 {
 	// Start reading pressure sensor
 	HAL_Delay(10);
@@ -88,21 +88,21 @@ void pressure_read(void)
 
 
 // Get current temperature in Celsius
-int32_t pressure_gettemp(void)
+int32_t lps25h_get_temperature(void)
 {
 	return temp_celsius;
 }
 
 
 // Get current pressure in hPa
-int32_t pressure_getpressure(void)
+int32_t lps25h_get_pressure(void)
 {
 	return pressure_hPa;
 }
 
 
 
-inline I2C_HandleTypeDef* pressure_get_i2c_handle(void)
+inline I2C_HandleTypeDef* lps25h_get_i2c_handle(void)
 {
 	return &hi2c1;
 }
diff --git a/Source/main.c b/Source/main.c
--- a/Source/main.c
+++ b/Source/main.c
@@ -24,8 +24,12 @@
 
 #include "config.h"
 #include "error.h"
-//#include "pressure.h"
-#include "bme280.h"
+
+#ifdef LPS25H
+	#include "lps25h.h"
+#else
+	#include "bme280.h"
+#endif
 #include "gps.h"
 
 #include "system/gpio.h"
@@ -49,8 +53,13 @@ int main(void)
   si446x_init();
   si446x_init();
   gps_poweron();
-//  pressure_init();
-  bme280_init();
+
+  #ifdef LPS25H
+    lps25h_init();
+  #else
+    bme280_init();
+  #endif
+
   // Software timers
   uint32_t last_transmission = HAL_GetTick();
   uint32_t last_led = HAL_GetTick();
@@ -61,8 +70,13 @@ int main(void)
 	  if(HAL_GetTick() - last_transmission > 700)
 	  {
 		  gps_update_data(); // Will always return at 1hz rate (default measurement rate)
-		  //pressure_read();
-		  bme280_update();
+
+		  #ifdef LPS25H
+		  	  lps25h_read();
+		  #else
+		  	  bme280_update();
+		  #endif
+
 		  while(afsk_busy()); // ensure previous message finished
 		  aprs_send();