Example programs for MultiTech Dot devices demonstrating how to use the Dot devices and the Dot libraries for LoRa communication.

Dependencies:   ISL29011

Dependents:   Dot-Examples-delujoc

This project has moved to github

Please see GitHub Dot-Examples

Dot Library Not Included!

Because these example programs can be used for both mDot and xDot devices, the LoRa stack is not included. The libmDot library should be imported if building for mDot devices. The libxDot library should be imported if building for xDot devices.

Dot Library Limitations

Commit messages in Dot Library repositories specify the version of the library and the version of mbed-os it was compiled against. We recommend building your application with the version of mbed-os specified in the commit message of the version of the Dot library you're using. This will ensure that you don't run into any runtime issues caused by differences in the mbed-os versions.

Example Programs Description

This application contains multiple example programs. Each example demonstrates a different way to configure and use a Dot. A short summary of each example is provided below. Common code used by multiple examples is in the dot_utils.cpp file.

All examples print logging, including RX data, on the USB debug port at 115200 baud. Each example defaults the Dot's configuration and saves the new configuration to NVM.

OTA Example

This example demonstrates configuring the Dot for OTA join mode and entering sleep or deepsleep mode between transactions with the gateway. If deepsleep mode is used, the session is saved and restored so that a rejoin is not necessary after waking up even though RAM contents have been lost. ACKs are disabled, but network link checks are configured - if enough link checks are missed, the Dot will no longer be considered joined to the network and will attempt to rejoin before transmitting more data.

AUTO_OTA Example

This example demonstrates configuring the Dot for AUTO_OTA join mode and entering sleep or deepsleep mode between transactions with the gateway. AUTO_OTA join mode automatically saves and restores the session when deepsleep mode is used, so the manual saving and restoring of the session is not necessary. ACKs are disabled, but network link checks are configured - if enough link checks are missed, the Dot will no longer be considered joined to the network and will attempt to rejoin before transmitting more data.

Manual Example

This example demonstrates configuring the Dot for MANUAL join mode and entering sleep or deepsleep mode between transactions with the gateway. The Dot must be provisioned on the gateway before its packets will be accepted! Follow these steps to provision the Dot on a Conduit gateway:

  • ssh into the conduit
  • use the lorq-query application to provision the Dot on the gateway
    • lora-query -a 01020304 A 0102030401020304 <your Dot's device ID> 01020304010203040102030401020304 01020304010203040102030401020304
    • if any of the credentials change on the Dot side, they must be updated on the gateway side as well

To provision a Dot on a third-party gateway, see the gateway or network provider documentation.

Class B Example

This example demonstrates how to configure the dot for an OTA join, how to acquire a lock on a GPS synchronized beacon, and then to subsequently enter class B mode of operation. After a successful join, the device will request to the dot-library to switch to class B. When this happens, the library will send an uplink to the network server (hence we must be joined first before entering this mode) requesting the GPS time to calculate when the next beacon is expected. Once this time elapses, the dot will open an rx window to demodulate the broadcasted beacon and fire an mDotEvent::BeaconRx event upon successful reception. After the beacon is received, the example sends an uplink which will have the class B bit in the packet's frame control set to indicate to the network server that downlinks may now be scheduled on ping slots. The lora-query application can be used to configure a Conduit gateway to communicate with a Dot in class B mode. For information on how to inform a third-party gateway that a Dot is operating in class B mode, see the gateway or network provider documentation.

Class C Example

This example demonstrates configuring the Dot for OTA join mode and communicating with the gateway using class C mode. In class C mode the gateway can send a packet to the Dot at any time, so it must be listening whenever it is not transmitting. This means that the Dot cannot enter sleep or deepsleep mode. The gateway will not immediately send packets to the Dot (outside the receive windows following a transmission from the Dot) until it is informed that the Dot is operating in class C mode. The lora-query application can be used to configure a Conduit gateway to communicate with a Dot in class C mode. For information on how to inform a third-party gateway that a Dot is operating in class C mode, see the gateway or network provider documentation.

FOTA Example

Full FOTA support is available on mDot and on xDot with external flash. See this article for details on adding external flash for xDot FOTA.

Without external flash xDot can use the FOTA example to dynamically join a multicast session only. After joining the multicast session the received Fragmentation packets could be handed to a host MCU for processing and at completion the firmware can be loaded into the xDot using the bootloader and y-modem. See xDot Developer Guide.

This example demonstrates how to incorporate over-the-air updates to an application. The example uses a Class C application. Class A or B functionality could also be used. The device will automatically enter into Class C operation for the FOTA operation, Class B would be disabled during the FOTA transfer.

  • Add the following code to allow Fota to use the Dot instance

examples/src/fota_example.cpp

    // Initialize FOTA singleton
    Fota::getInstance(dot);
  • Add fragmentation and multicast handling the the PacketRx event

examples/inc/RadioEvent.h

    virtual void PacketRx(uint8_t port, uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr, lora::DownlinkControl ctrl, uint8_t slot, uint8_t retries, uint32_t address, uint32_t fcnt, bool dupRx) {
        mDotEvent::PacketRx(port, payload, size, rssi, snr, ctrl, slot, retries, address, fcnt, dupRx);

#if ACTIVE_EXAMPLE == FOTA_EXAMPLE
        if(port == 200 || port == 201 || port == 202) {
            Fota::getInstance()->processCmd(payload, port, size);
        }
#endif
    }

A definition is needed to enable FOTA.

mbed_app.json

{
    "macros": [
        "FOTA=1"
    ]
}


Peer to Peer Example

This example demonstrates configuring Dots for peer to peer communication without a gateway. It should be compiled and run on two Dots. Peer to peer communication uses LoRa modulation but uses a single higher throughput (usually 500kHz or 250kHz) datarate. It is similar to class C operation - when a Dot isn't transmitting, it's listening for packets from the other Dot. Both Dots must be configured exactly the same for peer to peer communication to be successful.


Choosing An Example Program and Channel Plan

Only the active example is compiled. The active example can be updated by changing the ACTIVE_EXAMPLE definition in the examples/example_config.h file.

By default the OTA_EXAMPLE will be compiled and the US915 channel plan will be used.

example_config.h

#ifndef __EXAMPLE__CONFIG_H__
#define __EXAMPLE__CONFIG_H__

#define OTA_EXAMPLE              1  // see ota_example.cpp
#define AUTO_OTA_EXAMPLE         2  // see auto_ota_example.cpp
#define MANUAL_EXAMPLE           3  // see manual_example.cpp
#define PEER_TO_PEER_EXAMPLE     4  // see peer_to_peer_example.cpp
#define CLASS_C_EXAMPLE          5  // see class_c_example.cpp

// the active example is the one that will be compiled
#if !defined(ACTIVE_EXAMPLE)
#define ACTIVE_EXAMPLE  OTA_EXAMPLE
#endif

// the active channel plan is the one that will be compiled
// options are :
//      CP_US915
//      CP_AU915
//      CP_EU868
//      CP_KR920
//      CP_AS923
//      CP_AS923_JAPAN
#if !defined(CHANNEL_PLAN)
#define CHANNEL_PLAN CP_US915
#endif

#endif


Compile the AUTO_OTA_EXAMPLE and use the EU868 channel plan instead.

example_config.h

#ifndef __EXAMPLE__CONFIG_H__
#define __EXAMPLE__CONFIG_H__

#define OTA_EXAMPLE              1  // see ota_example.cpp
#define AUTO_OTA_EXAMPLE         2  // see auto_ota_example.cpp
#define MANUAL_EXAMPLE           3  // see manual_example.cpp
#define PEER_TO_PEER_EXAMPLE     4  // see peer_to_peer_example.cpp
#define CLASS_C_EXAMPLE          5  // see class_c_example.cpp

// the active example is the one that will be compiled
#if !defined(ACTIVE_EXAMPLE)
#define ACTIVE_EXAMPLE  AUTO_OTA_EXAMPLE
#endif

// the active channel plan is the one that will be compiled
// options are :
//      CP_US915
//      CP_AU915
//      CP_EU868
//      CP_KR920
//      CP_AS923
//      CP_AS923_JAPAN
#if !defined(CHANNEL_PLAN)
#define CHANNEL_PLAN CP_EU868
#endif

#endif



Dot Libraries

Stable and development libraries are available for both mDot and xDot platforms. The library chosen must match the target platform. Compiling for the mDot platform with the xDot library or vice versa will not succeed.

mDot Library

Development library for mDot.

libmDot-dev

Stable library for mDot.

libmDot-stable


For mbed-os 5 use:

Import librarylibmDot-mbed5

Stable version of the mDot library for mbed 5. This version of the library is suitable for deployment scenarios. See lastest commit message for version of mbed-os library that has been tested against.

xDot Library

Development library for xDot.

libxDot-dev

Stable library for xDot.

libxDot-stable


For mbed-os 5 use:

Import librarylibxDot-mbed5

Stable version of the xDot library for mbed 5. This version of the library is suitable for deployment scenarios.

Committer:
Evan Hosseini
Date:
Mon Apr 30 14:46:28 2018 -0500
Revision:
30:2f5ae37e6c47
Parent:
29:9e2c0d990ace
Child:
31:b1d5811e3d5d
Add ambient light sensor code back for xDot

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Mike Fiore 10:4d0b765f7b9e 1 #include "dot_util.h"
Mike Fiore 14:19fae4509473 2 #include "RadioEvent.h"
Mike Fiore 10:4d0b765f7b9e 3
Mike Fiore 10:4d0b765f7b9e 4 #if ACTIVE_EXAMPLE == CLASS_C_EXAMPLE
Mike Fiore 10:4d0b765f7b9e 5
mfiore 17:d4f82e16de5f 6 /////////////////////////////////////////////////////////////////////////////
mfiore 17:d4f82e16de5f 7 // -------------------- DOT LIBRARY REQUIRED ------------------------------//
mfiore 17:d4f82e16de5f 8 // * Because these example programs can be used for both mDot and xDot //
mfiore 17:d4f82e16de5f 9 // devices, the LoRa stack is not included. The libmDot library should //
mfiore 17:d4f82e16de5f 10 // be imported if building for mDot devices. The libxDot library //
mfiore 17:d4f82e16de5f 11 // should be imported if building for xDot devices. //
mfiore 17:d4f82e16de5f 12 // * https://developer.mbed.org/teams/MultiTech/code/libmDot-dev-mbed5/ //
mfiore 17:d4f82e16de5f 13 // * https://developer.mbed.org/teams/MultiTech/code/libmDot-mbed5/ //
mfiore 17:d4f82e16de5f 14 // * https://developer.mbed.org/teams/MultiTech/code/libxDot-dev-mbed5/ //
mfiore 17:d4f82e16de5f 15 // * https://developer.mbed.org/teams/MultiTech/code/libxDot-mbed5/ //
mfiore 17:d4f82e16de5f 16 /////////////////////////////////////////////////////////////////////////////
mfiore 17:d4f82e16de5f 17
Mike Fiore 10:4d0b765f7b9e 18 /////////////////////////////////////////////////////////////
Mike Fiore 10:4d0b765f7b9e 19 // * these options must match the settings on your gateway //
Mike Fiore 10:4d0b765f7b9e 20 // * edit their values to match your configuration //
Mike Fiore 10:4d0b765f7b9e 21 // * frequency sub band is only relevant for the 915 bands //
Mike Fiore 10:4d0b765f7b9e 22 // * either the network name and passphrase can be used or //
Mike Fiore 10:4d0b765f7b9e 23 // the network ID (8 bytes) and KEY (16 bytes) //
Mike Fiore 10:4d0b765f7b9e 24 /////////////////////////////////////////////////////////////
Mike Fiore 10:4d0b765f7b9e 25 static std::string network_name = "MultiTech";
Mike Fiore 10:4d0b765f7b9e 26 static std::string network_passphrase = "MultiTech";
Mike Fiore 10:4d0b765f7b9e 27 static uint8_t network_id[] = { 0x6C, 0x4E, 0xEF, 0x66, 0xF4, 0x79, 0x86, 0xA6 };
Mike Fiore 10:4d0b765f7b9e 28 static uint8_t network_key[] = { 0x1F, 0x33, 0xA1, 0x70, 0xA5, 0xF1, 0xFD, 0xA0, 0xAB, 0x69, 0x7A, 0xAE, 0x2B, 0x95, 0x91, 0x6B };
Mike Fiore 10:4d0b765f7b9e 29 static uint8_t frequency_sub_band = 0;
Evan Hosseini 30:2f5ae37e6c47 30 static bool public_network = true;
Evan Hosseini 25:56f7775c702f 31 static uint8_t join_delay = 5;
Mike Fiore 10:4d0b765f7b9e 32 static uint8_t ack = 1;
Mike Fiore 21:09d05faf0e13 33 static bool adr = true;
Mike Fiore 10:4d0b765f7b9e 34
Mike Fiore 10:4d0b765f7b9e 35 mDot* dot = NULL;
Mike Fiore 21:09d05faf0e13 36 lora::ChannelPlan* plan = NULL;
Mike Fiore 10:4d0b765f7b9e 37
Mike Fiore 10:4d0b765f7b9e 38 Serial pc(USBTX, USBRX);
Mike Fiore 10:4d0b765f7b9e 39
Evan Hosseini 30:2f5ae37e6c47 40 #if defined(TARGET_XDOT_L151CC)
Evan Hosseini 30:2f5ae37e6c47 41 I2C i2c(I2C_SDA, I2C_SCL);
Evan Hosseini 30:2f5ae37e6c47 42 ISL29011 lux(i2c);
Evan Hosseini 30:2f5ae37e6c47 43 #else
Evan Hosseini 30:2f5ae37e6c47 44 AnalogIn lux(XBEE_AD0);
Evan Hosseini 30:2f5ae37e6c47 45 #endif
Evan Hosseini 30:2f5ae37e6c47 46
Mike Fiore 10:4d0b765f7b9e 47 int main() {
Mike Fiore 14:19fae4509473 48 // Custom event handler for automatically displaying RX data
Mike Fiore 10:4d0b765f7b9e 49 RadioEvent events;
Mike Fiore 10:4d0b765f7b9e 50
Mike Fiore 10:4d0b765f7b9e 51 pc.baud(115200);
Mike Fiore 10:4d0b765f7b9e 52
Evan Hosseini 30:2f5ae37e6c47 53 #if defined(TARGET_XDOT_L151CC)
Evan Hosseini 30:2f5ae37e6c47 54 i2c.frequency(400000);
Evan Hosseini 30:2f5ae37e6c47 55 #endif
Evan Hosseini 30:2f5ae37e6c47 56
Mike Fiore 10:4d0b765f7b9e 57 mts::MTSLog::setLogLevel(mts::MTSLog::TRACE_LEVEL);
Mike Fiore 10:4d0b765f7b9e 58
Mike Fiore 21:09d05faf0e13 59 #if CHANNEL_PLAN == CP_US915
Mike Fiore 21:09d05faf0e13 60 plan = new lora::ChannelPlan_US915();
Mike Fiore 21:09d05faf0e13 61 #elif CHANNEL_PLAN == CP_AU915
Mike Fiore 21:09d05faf0e13 62 plan = new lora::ChannelPlan_AU915();
Mike Fiore 21:09d05faf0e13 63 #elif CHANNEL_PLAN == CP_EU868
Mike Fiore 21:09d05faf0e13 64 plan = new lora::ChannelPlan_EU868();
Mike Fiore 21:09d05faf0e13 65 #elif CHANNEL_PLAN == CP_KR920
Mike Fiore 21:09d05faf0e13 66 plan = new lora::ChannelPlan_KR920();
Mike Fiore 21:09d05faf0e13 67 #elif CHANNEL_PLAN == CP_AS923
Mike Fiore 21:09d05faf0e13 68 plan = new lora::ChannelPlan_AS923();
Mike Fiore 21:09d05faf0e13 69 #elif CHANNEL_PLAN == CP_AS923_JAPAN
Mike Fiore 21:09d05faf0e13 70 plan = new lora::ChannelPlan_AS923_Japan();
mfiore 22:d9bc10bbc433 71 #elif CHANNEL_PLAN == CP_IN865
mfiore 22:d9bc10bbc433 72 plan = new lora::ChannelPlan_IN865();
Mike Fiore 21:09d05faf0e13 73 #endif
Mike Fiore 21:09d05faf0e13 74 assert(plan);
Mike Fiore 21:09d05faf0e13 75
Mike Fiore 21:09d05faf0e13 76 dot = mDot::getInstance(plan);
Mike Fiore 21:09d05faf0e13 77 assert(dot);
Mike Fiore 10:4d0b765f7b9e 78
Mike Fiore 16:a3832552dfe1 79 logInfo("mbed-os library version: %d", MBED_LIBRARY_VERSION);
Mike Fiore 16:a3832552dfe1 80
Mike Fiore 12:ec9768677cea 81 // start from a well-known state
Mike Fiore 12:ec9768677cea 82 logInfo("defaulting Dot configuration");
Mike Fiore 12:ec9768677cea 83 dot->resetConfig();
Mike Fiore 12:ec9768677cea 84 dot->resetNetworkSession();
Mike Fiore 12:ec9768677cea 85
Mike Fiore 12:ec9768677cea 86 // make sure library logging is turned on
Mike Fiore 10:4d0b765f7b9e 87 dot->setLogLevel(mts::MTSLog::INFO_LEVEL);
Mike Fiore 10:4d0b765f7b9e 88
Mike Fiore 10:4d0b765f7b9e 89 // attach the custom events handler
Mike Fiore 10:4d0b765f7b9e 90 dot->setEvents(&events);
Mike Fiore 10:4d0b765f7b9e 91
Mike Fiore 10:4d0b765f7b9e 92 // update configuration if necessary
Mike Fiore 10:4d0b765f7b9e 93 if (dot->getJoinMode() != mDot::OTA) {
Mike Fiore 10:4d0b765f7b9e 94 logInfo("changing network join mode to OTA");
Mike Fiore 10:4d0b765f7b9e 95 if (dot->setJoinMode(mDot::OTA) != mDot::MDOT_OK) {
Mike Fiore 10:4d0b765f7b9e 96 logError("failed to set network join mode to OTA");
Mike Fiore 10:4d0b765f7b9e 97 }
Mike Fiore 10:4d0b765f7b9e 98 }
Mike Fiore 12:ec9768677cea 99 // in OTA and AUTO_OTA join modes, the credentials can be passed to the library as a name and passphrase or an ID and KEY
Mike Fiore 10:4d0b765f7b9e 100 // only one method or the other should be used!
Mike Fiore 10:4d0b765f7b9e 101 // network ID = crc64(network name)
Mike Fiore 10:4d0b765f7b9e 102 // network KEY = cmac(network passphrase)
Evan Hosseini 30:2f5ae37e6c47 103 update_ota_config_name_phrase(network_name, network_passphrase, frequency_sub_band, public_network, ack);
Mike Fiore 10:4d0b765f7b9e 104 //update_ota_config_id_key(network_id, network_key, frequency_sub_band, public_network, ack);
Mike Fiore 10:4d0b765f7b9e 105
Mike Fiore 10:4d0b765f7b9e 106 // configure the Dot for class C operation
Mike Fiore 10:4d0b765f7b9e 107 // the Dot must also be configured on the gateway for class C
Mike Fiore 10:4d0b765f7b9e 108 // use the lora-query application to do this on a Conduit: http://www.multitech.net/developer/software/lora/lora-network-server/
Mike Fiore 10:4d0b765f7b9e 109 // to provision your Dot for class C operation with a 3rd party gateway, see the gateway or network provider documentation
Mike Fiore 10:4d0b765f7b9e 110 logInfo("changing network mode to class C");
Mike Fiore 10:4d0b765f7b9e 111 if (dot->setClass("C") != mDot::MDOT_OK) {
Mike Fiore 10:4d0b765f7b9e 112 logError("failed to set network mode to class C");
Mike Fiore 10:4d0b765f7b9e 113 }
Mike Fiore 21:09d05faf0e13 114
Mike Fiore 21:09d05faf0e13 115 // enable or disable Adaptive Data Rate
Mike Fiore 21:09d05faf0e13 116 dot->setAdr(adr);
Evan Hosseini 25:56f7775c702f 117
Evan Hosseini 25:56f7775c702f 118 // Configure the join delay
Evan Hosseini 25:56f7775c702f 119 dot->setJoinDelay(join_delay);
Evan Hosseini 25:56f7775c702f 120
Mike Fiore 10:4d0b765f7b9e 121 // save changes to configuration
Mike Fiore 10:4d0b765f7b9e 122 logInfo("saving configuration");
Mike Fiore 10:4d0b765f7b9e 123 if (!dot->saveConfig()) {
Mike Fiore 10:4d0b765f7b9e 124 logError("failed to save configuration");
Mike Fiore 10:4d0b765f7b9e 125 }
Mike Fiore 10:4d0b765f7b9e 126
Mike Fiore 10:4d0b765f7b9e 127 // display configuration
Mike Fiore 10:4d0b765f7b9e 128 display_config();
Mike Fiore 10:4d0b765f7b9e 129
Mike Fiore 10:4d0b765f7b9e 130 while (true) {
Evan Hosseini 30:2f5ae37e6c47 131 uint16_t light;
Mike Fiore 10:4d0b765f7b9e 132 std::vector<uint8_t> tx_data;
Mike Fiore 10:4d0b765f7b9e 133
Mike Fiore 10:4d0b765f7b9e 134 // join network if not joined
Mike Fiore 10:4d0b765f7b9e 135 if (!dot->getNetworkJoinStatus()) {
Mike Fiore 10:4d0b765f7b9e 136 join_network();
Mike Fiore 10:4d0b765f7b9e 137 }
Mike Fiore 10:4d0b765f7b9e 138
Evan Hosseini 30:2f5ae37e6c47 139 #if defined(TARGET_XDOT_L151CC)
Evan Hosseini 30:2f5ae37e6c47 140 // configure the ISL29011 sensor on the xDot-DK for continuous ambient light sampling, 16 bit conversion, and maximum range
Evan Hosseini 30:2f5ae37e6c47 141 lux.setMode(ISL29011::ALS_CONT);
Evan Hosseini 30:2f5ae37e6c47 142 lux.setResolution(ISL29011::ADC_16BIT);
Evan Hosseini 30:2f5ae37e6c47 143 lux.setRange(ISL29011::RNG_64000);
Evan Hosseini 30:2f5ae37e6c47 144
Evan Hosseini 30:2f5ae37e6c47 145 // get the latest light sample and send it to the gateway
Evan Hosseini 30:2f5ae37e6c47 146 light = lux.getData();
Evan Hosseini 30:2f5ae37e6c47 147 tx_data.push_back((light >> 8) & 0xFF);
Evan Hosseini 30:2f5ae37e6c47 148 tx_data.push_back(light & 0xFF);
Evan Hosseini 30:2f5ae37e6c47 149 logInfo("light: %lu [0x%04X]", light, light);
Mike Fiore 10:4d0b765f7b9e 150 send_data(tx_data);
Mike Fiore 10:4d0b765f7b9e 151
Evan Hosseini 30:2f5ae37e6c47 152 // put the LSL29011 ambient light sensor into a low power state
Evan Hosseini 30:2f5ae37e6c47 153 lux.setMode(ISL29011::PWR_DOWN);
Evan Hosseini 30:2f5ae37e6c47 154 #else
Evan Hosseini 30:2f5ae37e6c47 155 // get some dummy data and send it to the gateway
Evan Hosseini 30:2f5ae37e6c47 156 light = lux.read_u16();
Evan Hosseini 30:2f5ae37e6c47 157 tx_data.push_back((light >> 8) & 0xFF);
Evan Hosseini 30:2f5ae37e6c47 158 tx_data.push_back(light & 0xFF);
Evan Hosseini 30:2f5ae37e6c47 159 logInfo("light: %lu [0x%04X]", light, light);
Evan Hosseini 30:2f5ae37e6c47 160 send_data(tx_data);
Evan Hosseini 30:2f5ae37e6c47 161 #endif
Evan Hosseini 30:2f5ae37e6c47 162
Mike Fiore 10:4d0b765f7b9e 163 // the Dot can't sleep in class C mode
Mike Fiore 10:4d0b765f7b9e 164 // it must be waiting for data from the gateway
Mike Fiore 10:4d0b765f7b9e 165 // send data every 30s
Mike Fiore 10:4d0b765f7b9e 166 logInfo("waiting for 30s");
Mike Fiore 10:4d0b765f7b9e 167 wait(30);
Mike Fiore 10:4d0b765f7b9e 168 }
Mike Fiore 10:4d0b765f7b9e 169
Mike Fiore 10:4d0b765f7b9e 170 return 0;
Mike Fiore 10:4d0b765f7b9e 171 }
Mike Fiore 10:4d0b765f7b9e 172
Mike Fiore 10:4d0b765f7b9e 173 #endif
Mike Fiore 10:4d0b765f7b9e 174