diff --git a/libraries/ruuvi_sensor_formats/sensortag.c b/libraries/ruuvi_sensor_formats/sensortag.c
index 11a86b10..0fbefb12 100644
--- a/libraries/ruuvi_sensor_formats/sensortag.c
+++ b/libraries/ruuvi_sensor_formats/sensortag.c
@@ -87,8 +87,12 @@ void encodeToRawFormat3(uint8_t* data_buffer, const ruuvi_sensor_t* const data)
     if(data->humidity == HUMIDITY_INVALID) { humidity = 0; }
     data_buffer[1] = humidity / 512;
     int32_t temperature = data->temperature;
+    // RAWv1 uses 1-complement negative numbers
+    if(temperature < 0) { temperature = 0 - temperature; }
     if(data->temperature == TEMPERATURE_INVALID) { temperature = 0; }
+    bool negative = ((data->temperature < 0) && data->temperature != TEMPERATURE_INVALID);
     data_buffer[2] = temperature / 100;
+    data_buffer[2] |= (negative<<7 & 0x80);
     data_buffer[3] = temperature % 100;
     uint32_t pressure = data->pressure;
     if(data->pressure == PRESSURE_INVALID) { pressure = 50000<<8; }
diff --git a/ruuvi_examples/ruuvi_firmware/bluetooth_application_config.h b/ruuvi_examples/ruuvi_firmware/bluetooth_application_config.h
index a569d841..97fef3cd 100644
--- a/ruuvi_examples/ruuvi_firmware/bluetooth_application_config.h
+++ b/ruuvi_examples/ruuvi_firmware/bluetooth_application_config.h
@@ -5,7 +5,7 @@
 #define APP_DEVICE_NAME                 APPLICATION_DEVICE_NAME         /**< TODO: Refactoring **/
 #define APP_DEVICE_NAME_LENGTH          APPLICATION_DEVICE_NAME_LENGTH
 #define APP_TX_POWER                    4                               /**< dBm **/
-#define INIT_FWREV                      "2.5.7"                         /**< Github tag. Do not include specifiers such as "alpha" so you can accept ready binaries as they are **/
+#define INIT_FWREV                      "2.5.9"                         /**< Github tag. Do not include specifiers such as "alpha" so you can accept ready binaries as they are **/
 #define INIT_SWREV                      INIT_FWREV                      /**< FW and SW are same thing in this context **/                             
 
 // milliseconds until main loop timer function is called. Other timers can bring
diff --git a/ruuvi_examples/ruuvi_firmware/ruuvitag_b/s132/armgcc/package.sh b/ruuvi_examples/ruuvi_firmware/ruuvitag_b/s132/armgcc/package.sh
new file mode 100755
index 00000000..85c8a90d
--- /dev/null
+++ b/ruuvi_examples/ruuvi_firmware/ruuvitag_b/s132/armgcc/package.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+nrfutil settings generate --family NRF52 --application _build/ruuvi_firmware.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 settings.hex
+mergehex -m ~/git/s132_nrf52_3.1.0_softdevice.hex ~/git/ruuvitag_b_bootloader_1.0.0.hex settings.hex -o sbc.hex
+mergehex -m sbc.hex _build/ruuvi_firmware.hex -o packet.hex
+
+nrfutil pkg generate --debug-mode --application _build/ruuvi_firmware.hex --hw-version 3 --sd-req 0x91 --key-file ~/git/ruuvitag_fw/keys/ruuvi_open_private.pem ruuvi_firmware_dfu.zip
+mv packet.hex ruuvi_firmware_full.hex
+