diff --git a/examples/Full_Almanac_Update/Full_Almanac_Update.ino b/examples/Full_Almanac_Update/Full_Almanac_Update.ino
new file mode 100644
index 0000000..44d489c
--- /dev/null
+++ b/examples/Full_Almanac_Update/Full_Almanac_Update.ino
@@ -0,0 +1,74 @@
+#include <Arduino.h>
+
+// #include <WM1110_Geolocation.hpp>
+#include <LbmWm1110.hpp>
+#include <Lbmx.hpp>
+#include <WM1110_Almanac_Update.hpp>
+
+/*
+    tips:
+        1.Make sure the almanac.h files are up to date,if not,please update it.
+        2.Note that the updated almanac in the almanac.h file are not necessarily newer than the almanac stored on the chip
+*/
+
+
+static LbmWm1110& lbmWm1110 = LbmWm1110::getInstance();
+
+// MyLbmxEventHandlers
+class MyLbmxEventHandlers : public LbmxEventHandlers
+{
+protected:
+    void reset(const LbmxEvent& event) override;
+
+};
+
+void MyLbmxEventHandlers::reset(const LbmxEvent& event)
+{
+
+}
+
+static void ModemEventHandler()
+{
+    static LbmxEvent event;
+    static MyLbmxEventHandlers handlers;
+
+    while (event.fetch())
+    {
+        printf("----- %s -----\n", event.getEventString().c_str());
+
+        handlers.invoke(event);
+    }
+}
+uint32_t local_almanac_date = 0;
+uint32_t stored_almanac_date = 0;
+void setup()
+{
+    Serial.begin(115200);
+    while (!Serial) delay(100); 
+
+    printf("WM1110 Almanac Update Example\r\n");
+
+    lbmWm1110.begin();
+
+    LbmxEngine::begin(lbmWm1110.getRadio(), ModemEventHandler);
+
+    wm1110_almanac_update.updateStoredAlmanac();
+
+    local_almanac_date = wm1110_almanac_update.getFullAlmanacDateTime();
+    stored_almanac_date = wm1110_almanac_update.getStoredAlmanacDateTime();
+}
+
+void loop()
+{    
+    if(local_almanac_date != stored_almanac_date)
+    {
+        printf("Update WM1110 almanac fail\r\n");
+    }
+    else
+    {
+        printf("Update WM1110 almanac success,almanac date:%u\r\n",local_almanac_date);        
+    }
+    delay(1000);
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/library.properties b/library.properties
new file mode 100644
index 0000000..4edfa34
--- /dev/null
+++ b/library.properties
@@ -0,0 +1,10 @@
+name=WM1110 almanac update 
+version=0.0.1
+author=SeeedWenzy
+maintainer=SeeedWenzy <zhiyi.wen@seeed.cc>
+sentence=A library for updating the almanac of WM1110
+paragraph=A library for updating the almanac of WM1110
+category=Device Control
+url=https://github.com/Seeed-Studio/
+architectures=nrf52
+includes=WM1110_Almanac_Update.hpp
diff --git a/src/WM1110_Almanac_Update.cpp b/src/WM1110_Almanac_Update.cpp
new file mode 100644
index 0000000..e847f31
--- /dev/null
+++ b/src/WM1110_Almanac_Update.cpp
@@ -0,0 +1,185 @@
+#include "WM1110_Almanac_Update.hpp"
+
+#include <LbmWm1110.hpp>
+#include <Lbmx.hpp>
+
+#include <Lbm_Modem_Common.hpp>
+
+#include "common/smtc_board/smtc_board.h"
+#include "common/apps_modem_common.h"
+#include "common/apps_modem_event.h"
+
+#include <lbm/smtc_modem_api/smtc_modem_utilities.h>
+#include <lbm/smtc_modem_core/radio_drivers/lr11xx_driver/src/lr11xx_types.h>
+#include <lbm/smtc_modem_core/radio_drivers/lr11xx_driver/src/lr11xx_gnss_types.h>
+#include <lbm/smtc_modem_core/radio_drivers/lr11xx_driver/src/lr11xx_gnss.h>
+#include "almanac.h"
+
+
+#define OFFSET_BETWEEN_GPS_EPOCH_AND_UNIX_EPOCH 315964800
+
+lr11xx_gnss_almanac_full_read_bytestream_t lr11xx_almanac;
+
+static LbmWm1110& lbmWm1110 = LbmWm1110::getInstance();
+ralf_t* modem_radio = lbmWm1110.getRadio();
+
+
+WM1110_Almanac_Update* WM1110_Almanac_Update::instance_ = nullptr;
+
+
+#if 1 // public function
+WM1110_Almanac_Update& WM1110_Almanac_Update::getInstance()
+{
+    if (instance_ == nullptr)
+    {
+        instance_ = new WM1110_Almanac_Update();
+    }
+
+    return *instance_;
+}
+
+WM1110_Almanac_Update::WM1110_Almanac_Update(void)
+{
+
+}
+
+void WM1110_Almanac_Update::begin( void )
+{
+
+}
+
+void WM1110_Almanac_Update::updateStoredAlmanac( void )
+{
+    uint32_t almanac_date = getStoredAlmanacDateTime( );
+    full_almanac_date_time = getFullAlmanacDateTime();
+    printf("LR11XX almanac date: %u, Local almanac date: %u\r\n", almanac_date, full_almanac_date_time );
+
+    if( almanac_date < full_almanac_date_time )
+    {
+        bool ret = almanac_update( modem_radio->ral.context, full_almanac, sizeof( full_almanac ));
+    }
+    else if(almanac_date > full_almanac_date_time)
+    {
+        printf("Please run get_full_almanac.py to update full almanac buffer firstly\r\n");
+    }
+    else
+    {
+        printf( "Local almanac matches LR11XX almanac -> no update\n" );
+    }
+}
+
+uint32_t WM1110_Almanac_Update::getStoredAlmanacDateTime( void )
+{
+    if( lr11xx_gnss_read_almanac( modem_radio->ral.context , lr11xx_almanac ) == LR11XX_STATUS_OK )
+    {
+        // printf( "almanac_date_raw: %02x%02x, %02x%02x\r\n", lr11xx_almanac[2], lr11xx_almanac[1], lr11xx_almanac[24], lr11xx_almanac[23] );
+        // uint16_t almanac_date_raw = ( uint16_t )( ( lr11xx_almanac[2] << 8 ) | lr11xx_almanac[1] );
+        uint16_t almanac_date_raw = ( uint16_t )( ( lr11xx_almanac[24] << 8 ) | lr11xx_almanac[23] );
+        uint32_t almanac_date = ( OFFSET_BETWEEN_GPS_EPOCH_AND_UNIX_EPOCH + 24 * 3600 * ( 2048 * 7 + almanac_date_raw ) );
+        return almanac_date;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+bool WM1110_Almanac_Update::get_almanac_crc( const void* ral_context, uint32_t* almanac_crc )
+{
+    lr11xx_status_t                         err;
+    lr11xx_gnss_context_status_bytestream_t context_status_bytestream;
+    lr11xx_gnss_context_status_t            context_status;
+
+    err = lr11xx_gnss_get_context_status( ral_context, context_status_bytestream );
+    if( err != LR11XX_STATUS_OK )
+    {
+        printf( "Failed to get gnss context status\n" );
+        return false;
+    }
+
+    err = lr11xx_gnss_parse_context_status_buffer( context_status_bytestream, &context_status );
+    if( err != LR11XX_STATUS_OK )
+    {
+        printf( "Failed to parse gnss context status to get almanac status\n" );
+        return false;
+    }
+
+    *almanac_crc = context_status.global_almanac_crc;
+
+    return true;
+}
+
+#endif
+
+
+#if 1 // private function
+bool WM1110_Almanac_Update::almanac_update( const void* ral_context, uint8_t *almanac_data, uint16_t almanac_len )
+{
+    uint32_t global_almanac_crc, local_almanac_crc;
+    local_almanac_crc = ( almanac_data[6] << 24 ) + ( almanac_data[5] << 16 ) + ( almanac_data[4] << 8 ) + ( almanac_data[3] );
+
+    if( get_almanac_crc( ral_context, &global_almanac_crc ) == false )
+    {
+        printf( "Failed to get almanac CRC before update\n" );
+        return false;
+    }
+    if( global_almanac_crc != local_almanac_crc )
+    {
+        printf( "Local almanac doesn't match LR11XX almanac -> start update\n" );
+
+        /* Load almanac in flash */
+        uint16_t almanac_idx = 0;
+        while( almanac_idx < almanac_len )
+        {
+            if( lr11xx_gnss_almanac_update( ral_context, almanac_data + almanac_idx, 1 ) != LR11XX_STATUS_OK )
+            {
+                printf( "Failed to update almanac\n" );
+                return false;
+            }
+            almanac_idx += LR11XX_GNSS_SINGLE_ALMANAC_WRITE_SIZE;
+        }
+
+        /* Check CRC again to confirm proper update */
+        if( get_almanac_crc( ral_context, &global_almanac_crc ) == false )
+        {
+            printf( "Failed to get almanac CRC after update\n" );
+            return false;
+        }
+        if( global_almanac_crc != local_almanac_crc )
+        {
+            printf( "0x%08x, 0x%08x\r\n", global_almanac_crc, local_almanac_crc );
+            printf( "Local almanac doesn't match LR11XX almanac -> update failed\n" );
+            return false;
+        }
+        else
+        {
+            uint32_t almanac_date = getStoredAlmanacDateTime( );
+            printf("LR11XX new almanac date: %u\r\n", almanac_date );
+            printf( "Almanac update succeeded\r\n" );
+        }
+    }
+    else
+    {
+        printf( "Local almanac matches LR11XX almanac -> no update\n" );
+    }
+
+    return true;
+}
+
+uint32_t WM1110_Almanac_Update::getFullAlmanacDateTime( void )
+{
+    //current
+    uint16_t almanac_date_raw = ( uint16_t )( ( full_almanac[2] << 8 ) | full_almanac[1] );
+    uint32_t almanac_date = ( OFFSET_BETWEEN_GPS_EPOCH_AND_UNIX_EPOCH + 24 * 3600 * ( 2048 * 7 + almanac_date_raw ) ); 
+    
+    full_almanac_date_time = almanac_date;
+    return full_almanac_date_time;
+}
+
+#endif
+
+WM1110_Almanac_Update wm1110_almanac_update;
+
+
+
+
diff --git a/src/WM1110_Almanac_Update.hpp b/src/WM1110_Almanac_Update.hpp
new file mode 100644
index 0000000..81548b7
--- /dev/null
+++ b/src/WM1110_Almanac_Update.hpp
@@ -0,0 +1,60 @@
+#ifndef _WM1110_ALMANAC_UPDATE_H_
+#define _WM1110_ALMANAC_UPDATE_H_
+
+#pragma once
+
+#include <cstdio>
+#include <cstdlib>
+#include <bluefruit.h>
+
+#include <Lbm_Modem_Common.hpp>
+
+
+class WM1110_Almanac_Update
+{
+    private:
+        static WM1110_Almanac_Update* instance_;
+
+        uint32_t full_almanac_date_time;
+        uint32_t stored_almanac_date_time;
+
+    public:
+        WM1110_Almanac_Update(void); 
+
+        static WM1110_Almanac_Update& getInstance();
+
+        void begin( void );
+
+        /*!
+        *  @brief  Updata WM1110 almanac
+        */     
+        void updateStoredAlmanac( void );
+
+        /*!
+        *  @brief  Get current almanac date time that Stored in WM1110
+        *  @return timestamp
+        */       
+        uint32_t getStoredAlmanacDateTime( void );
+
+        /*!
+        *  @brief  Get full almanac date time from full_almanac(almanac.h)
+        *  @return timestamp
+        */   
+        uint32_t getFullAlmanacDateTime( void );
+
+    private:
+    
+        bool get_almanac_crc( const void* ral_context, uint32_t* almanac_crc ); 
+
+        bool almanac_update( const void* ral_context, uint8_t *almanac_data, uint16_t almanac_len );
+
+    public:
+ 
+};
+
+extern WM1110_Almanac_Update wm1110_almanac_update;
+
+#endif /* _WM1110_ALMANAC_UPDATE_H_ */
+
+
+
diff --git a/src/almanac.h b/src/almanac.h
new file mode 100644
index 0000000..1e46514
--- /dev/null
+++ b/src/almanac.h
@@ -0,0 +1,5 @@
+/* This file has been auto-generated by the get_full_almanac.py script */
+
+#include "lbm/smtc_modem_core/radio_drivers/lr11xx_driver/src/lr11xx_gnss.h"
+
+static uint8_t full_almanac[( LR11XX_GNSS_FULL_UPDATE_N_ALMANACS * LR11XX_GNSS_SINGLE_ALMANAC_WRITE_SIZE ) + 20] = { 0x80, 0x90, 0x06, 0xC6, 0xBF, 0x10, 0x58, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x01, 0x5D, 0x43, 0x28, 0x24, 0x04, 0x6D, 0x27, 0x9F, 0x2E, 0x5F, 0xCA, 0xFC, 0xDD, 0xA6, 0xFF, 0x6F, 0x00, 0x01, 0x00, 0x02, 0x0B, 0x43, 0x28, 0x4C, 0x01, 0xFF, 0x27, 0xB2, 0x93, 0x80, 0x2D, 0x10, 0x0C, 0xAE, 0xFF, 0x37, 0x00, 0x01, 0x00, 0x03, 0x15, 0x43, 0x28, 0xB0, 0x00, 0x3E, 0x27, 0x66, 0x0F, 0x63, 0x83, 0x11, 0x38, 0xA6, 0xFF, 0x1B, 0x00, 0x01, 0x00, 0x04, 0x6A, 0x43, 0x28, 0x82, 0x01, 0x78, 0x27, 0xF8, 0x27, 0x88, 0x32, 0x13, 0x0A, 0xAA, 0xFF, 0xA4, 0x01, 0x01, 0x00, 0x05, 0x79, 0x43, 0x28, 0xC2, 0x00, 0x53, 0x28, 0x99, 0xCB, 0x39, 0xDE, 0xD0, 0xE1, 0xAC, 0xFF, 0xD2, 0x00, 0x01, 0x00, 0x06, 0x4E, 0x43, 0x28, 0x84, 0x04, 0xB9, 0x26, 0x40, 0xA6, 0xB9, 0xA7, 0x65, 0x61, 0xAC, 0xFF, 0xA6, 0x01, 0x01, 0x00, 0x07, 0x6D, 0x43, 0x28, 0x46, 0x02, 0xF3, 0x26, 0x7C, 0x19, 0x3E, 0x0B, 0x6F, 0xB5, 0xA0, 0xFF, 0xD3, 0x00, 0x01, 0x00, 0x08, 0x6A, 0x43, 0x28, 0xC3, 0x00, 0xFA, 0x26, 0xDD, 0x2E, 0x9B, 0x50, 0xB4, 0x35, 0xA4, 0xFF, 0x69, 0x00, 0x01, 0x00, 0x09, 0x4A, 0x43, 0x28, 0x53, 0x02, 0xFC, 0x27, 0x6A, 0x6D, 0x03, 0x9D, 0xF5, 0x0B, 0xAE, 0xFF, 0xBB, 0x00, 0x01, 0x00, 0x0A, 0x29, 0x43, 0x28, 0x53, 0x00, 0x5D, 0x27, 0x93, 0xFD, 0xDC, 0x95, 0x57, 0xE3, 0xAA, 0xFF, 0x5D, 0x00, 0x01, 0x00, 0x0B, 0x6F, 0x43, 0x28, 0x3A, 0x02, 0x4B, 0x27, 0x37, 0x8B, 0xCB, 0x38, 0xD0, 0x8E, 0xA9, 0xFF, 0x17, 0x00, 0x01, 0x00, 0x0C, 0x31, 0x43, 0x28, 0xF8, 0x01, 0x85, 0x27, 0x03, 0x0C, 0xDF, 0x26, 0x58, 0x3C, 0xA5, 0xFF, 0x0B, 0x00, 0x01, 0x00, 0x0D, 0x41, 0x43, 0x28, 0xF0, 0x00, 0x9D, 0x26, 0xB9, 0x88, 0xDE, 0x87, 0x21, 0x8D, 0xA5, 0xFF, 0x05, 0x00, 0x01, 0x00, 0x0E, 0xFD, 0x42, 0x28, 0xF6, 0x03, 0x06, 0x26, 0xCA, 0xEF, 0xD0, 0x33, 0xB3, 0x30, 0xA2, 0xFF, 0x02, 0x00, 0x01, 0x00, 0x0F, 0x49, 0x43, 0x28, 0x7D, 0x03, 0x46, 0x27, 0x2B, 0x43, 0x9B, 0x20, 0x8C, 0x8F, 0xA6, 0xFF, 0x01, 0x00, 0x01, 0x00, 0x10, 0x1A, 0x43, 0x28, 0x8B, 0x03, 0x96, 0x27, 0xDE, 0x1B, 0xDB, 0xC7, 0x2B, 0xB9, 0xA0, 0xFF, 0x91, 0x01, 0x01, 0x00, 0x11, 0x35, 0x43, 0x28, 0xFB, 0x00, 0xB4, 0x27, 0x9D, 0xC6, 0xD7, 0x83, 0x18, 0xE2, 0xAB, 0xFF, 0xC8, 0x00, 0x01, 0x00, 0x12, 0x35, 0x43, 0x28, 0x65, 0x02, 0x8D, 0x27, 0x99, 0x6F, 0x9A, 0x63, 0xFB, 0xBA, 0xA4, 0xFF, 0x64, 0x00, 0x01, 0x00, 0x13, 0x33, 0x43, 0x28, 0x0D, 0x01, 0xC2, 0x26, 0x0C, 0xE4, 0xE9, 0x8E, 0xF8, 0x04, 0xA9, 0xFF, 0x32, 0x00, 0x01, 0x00, 0x14, 0x68, 0x43, 0x28, 0x5E, 0x06, 0x31, 0x27, 0x16, 0x1B, 0x19, 0xE4, 0xBE, 0xDD, 0xA5, 0xFF, 0x19, 0x00, 0x01, 0x00, 0x15, 0x5E, 0x43, 0x28, 0xDB, 0x03, 0x3F, 0x27, 0x3D, 0x32, 0x79, 0xD0, 0xAF, 0x8F, 0xAB, 0xFF, 0x0C, 0x00, 0x01, 0x00, 0x16, 0x4B, 0x43, 0x28, 0xFD, 0x00, 0xCA, 0x27, 0xBC, 0x9D, 0xF4, 0x83, 0xD1, 0x0A, 0xAD, 0xFF, 0xCC, 0x01, 0x01, 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diff --git a/src/get_full_almanac.py b/src/get_full_almanac.py
new file mode 100644
index 0000000..2dd8260
--- /dev/null
+++ b/src/get_full_almanac.py
@@ -0,0 +1,107 @@
+"""
+The Clear BSD License
+Copyright Semtech Corporation 2021. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted (subject to the limitations in the disclaimer
+below) provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the Semtech corporation nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY
+THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
+NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SEMTECH CORPORATION BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+"""
+
+import base64
+import requests
+
+import sys
+from argparse import ArgumentParser
+
+# refer to https://github.com/Lora-net/SWSD004/blob/master/apps/examples/full_almanac_update/get_full_almanac.py
+# mgs_token : 
+# filename: almanac.h
+# Command example:
+#       python  .\get_full_almanac.py -f almanac.h mgs_token   
+
+OFFSET_BETWEEN_GPS_EPOCH_AND_UNIX_EPOCH = 315964800
+
+def main():
+
+    # The file in which the almanac will be written to
+    filename_default = "almanac.h"
+    parser = ArgumentParser(
+        description="Companion software that generates almanac header file to be compiled for LR1110/LR1120 embedded full almanac update."
+    )
+    parser.add_argument(
+        "mgs_token", help="MGS LoRa Cloud token to use to fetch the almanac"
+    )
+    parser.add_argument(
+        "-f",
+        "--output_file",
+        help="file that will contain the results",
+        default=filename_default,
+    )
+    args = parser.parse_args()
+
+    mgs_token = args.mgs_token
+    filename = args.output_file
+
+    # Build request URL
+    url = "https://mgs.loracloud.com/api/v1/almanac/full"
+    print("Requesting latest full almanac image available...")
+
+    # HTTP request to MGS
+    my_header = {"Authorization": mgs_token}
+    res = requests.get(url, headers=my_header)
+
+    if res.status_code != 200:
+        print("ERROR: failed to get almanac - " + str(res))
+        sys.exit(2)
+    else:
+        print("Success")
+    print(res.json())
+    print()
+    raw_bytes = bytes(base64.b64decode(res.json()["result"]["almanac_image"]))
+
+    print(len(raw_bytes))   
+    print(raw_bytes)    
+    # Build the byte array containing the almanac to be written to LR11xx
+    my_almanac_in_hex = "static uint8_t full_almanac[( LR11XX_GNSS_FULL_UPDATE_N_ALMANACS * LR11XX_GNSS_SINGLE_ALMANAC_WRITE_SIZE ) + 20] = { "
+    my_almanac_in_hex += ", ".join("0x{:02X}".format(byt) for byt in raw_bytes)
+    my_almanac_in_hex += " };"
+
+    # Write C file to be included to the full_almanac_update application for writting to LR11xx
+    file_header = (
+        "/* This file has been auto-generated by the get_full_almanac.py script */\n\n"
+    )
+    file_header += '#include "lbm/smtc_modem_core/radio_drivers/lr11xx_driver/src/lr11xx_gnss.h"\n\n'
+    with open(filename, "w") as f:
+        f.write(file_header + my_almanac_in_hex + "\n")
+
+    print("Almanac image written to " + filename + " file")
+
+    almanac_date_raw = ( ( raw_bytes[2] << 8 ) | raw_bytes[1] )
+    print(almanac_date_raw)
+
+    almanac_date = ( OFFSET_BETWEEN_GPS_EPOCH_AND_UNIX_EPOCH + 24 * 3600 * ( 2048 * 7 + almanac_date_raw ) ); 
+    print("current almanac date timestamp:",almanac_date)  
+
+if __name__ == "__main__":
+    main()