VVXLM074LM074 Bluetooth 5.0 Dual Mode Module

LM074 SPP with GAP Central Application USER GUIDE © All rights reserved. All trade names are registered trademarks of respective manufacturers listed. This manual may not be copied in any media or form without the written consent of original maker. © Copyright LM Technologies Ltd Page 2 of 70 www.lm-technologies.com LM074 SPP with GAP Central Application v1.1 Revision Date Changes Description v1.0 17/11/2017 First revision of this document. v1.1 25/09/2018 Added firmware revision history and LED indication information. © Copyright LM Technologies Ltd Page 3 of 70 www.lm-technologies.com LM074 SPP with GAP Central Application v1.1 Contents 1. Introduction ......................................................................................... 7 2. Functionality of SPP with GAP Central application .............................. 7 3. LM074 GAP Central Role ...................................................................... 8 3.1 GAP Central AT commands in brief ...................................................... 9 3.2 Enable GAP Central functionality: ...................................................... 11 3.3 BLE discovery commands: ................................................................ 12 3.4 BLE security commands: ................................................................... 15 3.5 BLE connection commands: .............................................................. 16 3.6 BLE Services/characteristic scan commands: ....................................... 20 3.7 BLE read data from Characteristic: .................................................... 22 3.8 BLE write data on Characteristic: ....................................................... 26 4. LM074 AT commands and Default configuration ............................... 32 4.1 AT commands .................................................................................. 33 4.2 Module Settings commands: .............................................................. 35 4.3 UART Settings commands: ................................................................ 39 4.4 Bluetooth Security Settings commands: .............................................. 42 4.5 SPP Related commands: ................................................................... 45 4.6 Firmware Upgrade commands: .......................................................... 49 5. LM074 Over The Air Firmware Upgrade Procedure ......................... 50 5.1 Pre-requisites for Firmware upgrade: ................................................. 50 5.2 Firmware upgrade procedure Flow chart: ........................................... 51 5.3 Possible Failure points and corrective actions ...................................... 53 6. Simple Secure Pairing between LM074 and remote device ............. 61 6.1 Pairing of LM074(BT2.1) with BT2.0 devices ....................................... 61 6.2 Pairing of LM074 (BT2.1) with BT2.1 devices ...................................... 61 7. LED Indication ................................................................................. 64 7.1 Power on LED sequence ................................................................... 64 7.2 LED0 ............................................................................................... 64 7.3 LED1 ............................................................................................... 64 7.4 LED2 ............................................................................................... 65 7.5 Pairing State ..................................................................................... 65 8. Appendix ......................................................................................... 66 8.1 Abbreviations ................................................................................... 66 8.2 BLE Peripheral characteristics ............................................................ 66 8.3 GATT UUID type .............................................................................. 67 © Copyright LM Technologies Ltd Page 4 of 70 www.lm-technologies.com LM074 SPP with GAP Central Application v1.1 8.4 GATT_Status_code ........................................................................... 68 8.5 BLE Service UUIDs ........................................................................... 70 © Copyright LM Technologies Ltd Page 5 of 70 www.lm-technologies.com LM074 SPP with GAP Central Application v1.1 Table of Figures Figure 1: Firmware Upgrade Flowchart ............................................................... 52 Figure 2: UART messages when the module is not connected to the peer device ... 55 Figure 3: UART messages when the module opens a partition to write new image . 56 Figure 4: UART messages when the CRC of the received image does not match .... 58 Figure 5: UART messages showing a failure in image verification .......................... 59 Figure 6: UART messages showing successful firmware upgrade .......................... 60 © Copyright LM Technologies Ltd Page 6 of 70 www.lm-technologies.com LM074 SPP with GAP Central Application v1.1 Firmware Revision History Version:0107 1. Up to Version_0106, the device will indicate the input pairing request to use and process it as per the Accept or Reject response from the user. 2. In Version_0107, this dependency is removed (like the LM048) and the device will accept all the pairing requests. The device will indicate the success or failure of the pairing procedure. Version:0107 – Recreated images for Ver_0107 – 20 Th June 2018 1. The images were recreated, the SPP_ESC_Sequence timeout is 2 seconds. 2. Other features are the same. 3. LM961 tested again with the LM154 test tool, passed the test successfully. 4. Added all production and OTA bin images. Version:0108 – 29 th June 2018 1. Version _0108 released for LM961/LM074 and LM068. 2. Bug fix – LM961/LM074/LM068 was not connecting to the WIN-PC after a successful pairing. The RFCOMM-Serial-Over-Bluetooth ports were not being c…

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Report No.: S EXHIBI EUT View 1 EUT View 2 SWTX19X10 T 2 - EUT 1 2 0071446W-1/2 T EXTER 2 RNAL PH HOTOGR APHS Model: L FCC LM074-0190 C Part 15.247

Report No.: S EXHIBI Proposed Specificatio n silk-screened Proposed SWTX19X10 T 1 - PRO FCC ID La ns: Text is b d onto the EU Label Loca 0071446W-1/2 ODUCT L abel Forma black in colo UT or shall be ation on EU 2 LABELIN at FCC ID: V r and justifie e affixed at a UT FCC NG VVXLM07 ed. Labels ar conspicuous ID Label Lo 74 re printed in location on t cation indelible ink the EUT. Model: L FCC k on perman LM074-0190 C Part 15.247 nent adhesivee

Report No.: S EXHIBI EUT View 1 EUT View 2 SWTX19X10 T 3 - EUT 1 2 0071446W-1/2 T INTER 2 NAL PHO OTOGRA APHS Model: L FCC LM074-0190 C Part 15.247 Report No.: S Antenna Vi SWTX19X10 iew BT Anten 0071446W-1/2 nna 2 Model: L FCC LM074-0190 C Part 15.247

1. MAXIMUM PERMISSIBLE EXPOSURE (MPE) 1.1 General Information Client Information Applicant: LM Technologies Ltd. Address of applicant: Unit 19, Spectrum House, 32-34 Gordon House Road, London, NW5 1LP, United Kingdom Manufacturer: LM Technologies Ltd. Address of manufacturer: Unit 19, Spectrum House, 32-34 Gordon House Road, London, NW5 1LP, United Kingdom General Description of EUT: Product Name: LM074 Bluetooth 5.0 Dual Mode Module Trade Name: LM Technologies Model No.: LM074-0190 Adding Model(s): LM074-0191, LM074-0192 FCC ID: VVXLM074 Rated Voltage: DC5V Technical Characteristics of EUT: Bluetooth Version: V5.0 (BR/EDR/BLE mode) Frequency Range: 2402-2480MHz RF Output Power: 7.378dBm (Conducted) Data Rate: 1Mbps, 2Mbps, 3Mbps Modulation: GFSK, Pi/4 DQPSK, 8DPSK Quantity of Channels: 79/40 Channel Separation: 1MHz/2MHz Type of Antenna: Integral Antenna Antenna Gain: 2.0dBi 1.2 Standard Applicable According to §1.1307(b)(1) and KDB 447498 D01 General RF Exposure Guidance v06, system operating under the provisions of this section shall be operating in a manner that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. (a) Limits for Occupational / Controlled Exposure Frequency range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times | E | 2 , | H | 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 / / F/300 6 1500-100000 / / 5 6 (b) Limits for General Population / Uncontrolled Exposure Frequency range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times | E | 2 , | H | 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 / / F/1500 30 1500-100000 / / 1 30 Note: f = frequency in MHz: * = Plane-wave equivalents power density 1.3 MPE Calculation Method S = (30*P*G) / (377*R 2 ) S = power density (in appropriate units, e.g., mw/cm 2 ) P = power input to the antenna (in appropriate units, e.g., mw) G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor is normally numeric gain. R = distance to the center of radiation of the antenna (in appropriate units, e.g., cm) 1.4 MPE Calculation Result Maximum Tune-Up output power: 8(dBm) Maximum peak output power at antenna input terminal: 6.31(mW) Prediction distance: >20(cm) Prediction frequency: 2402 (MHz) Antenna gain:2.0(dBi) Directional gain (numeric gain): 1.58 The worst case is power density at prediction frequency at 20cm: 0.0020(mw/cm 2 ) MPE limit for general population exposure at prediction frequency: 1 (mw/cm 2 ) Result: Pass

Model: LM074-0190 Report No.: WTX19X10071446W-1 Page 1 of 55 FCC Part 15.247 FCC Part 15C Measurement and Test Report For LM Technologies Ltd. Unit 19, Spectrum House, 32-34 Gordon House Road, London, NW5 1LP, United Kingdom FCC ID: VVXLM074 FCC Rule(s): FCC Part 15.247 Product Description: LM074 Bluetooth 5.0 Dual Mode Module Tested Model: LM074-0190 Report No.: WTX19X10071446W-1 Sample Receipt Date: 2019-10-17 Tested Date: 2019-10-17 to 2019-12-18 Issued Date: 2019-12-19 Tested By: Jack Huang / Engineer Reviewed By: Silin Chen / EMC Manager Approved & Authorized By: Jandy So / PSQ Manager Prepared By: Shenzhen SEM Test Technology Co., Ltd. 1/F, Building A, Hongwei Industrial Park, Liuxian 2nd Road, Bao'an District, Shenzhen, P.R.C.（518101） Tel.: +86-755-33663308 Fax.: +86-755-33663309 Website: www.semtest.com.cn Note: This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen SEM Test Technology Co., Ltd. Model: LM074-0190 Report No.: WTX19X10071446W-1 Page 2 of 55 FCC Part 15.247 TABLE OF CONTENTS 1. GENERAL INFORMATION ................................................................................................................................... 4 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ............................................................................... 4 1.2 TEST STANDARDS ................................................................................................................................................... 5 1.3 TEST METHODOLOGY ............................................................................................................................................. 5 1.4 TEST FACILITY ....................................................................................................................................................... 5 1.5 EUT SETUP AND TEST MODE ................................................................................................................................. 6 1.6 MEASUREMENT UNCERTAINTY .............................................................................................................................. 7 1.7 TEST EQUIPMENT LIST AND DETAILS ..................................................................................................................... 8 2. SUMMARY OF TEST RESULTS ......................................................................................................................... 10 3. RF EXPOSURE ....................................................................................................................................................... 11 3.1 STANDARD APPLICABLE ....................................................................................................................................... 11 3.2 TEST RESULT........................................................................................................................................................ 11 4. ANTENNA REQUIREMENT ................................................................................................................................ 12 4.1 STANDARD APPLICABLE ....................................................................................................................................... 12 4.2 EVALUATION INFORMATION ................................................................................................................................ 12 5. FREQUENCY HOPPING SYSTEM REQUIREMENTS ................................................................................... 13 5.1 STANDARD APPLICABLE ....................................................................................................................................... 13 5.2 FREQUENCY HOPPING SYSTEM............................................................................................................................. 13 5.3 EUT PSEUDORANDOM FREQUENCY HOPPING SEQUENCE .................................................................................... 14 6. QUANTITY OF HOPPING CHANNELS AND CHANNEL SEPARATION ................................................... 15 6.1 STANDARD APPLICABLE ....................................................................................................................................... 15 6.2 TEST PROCEDURE ................................................................................................................................................. 15 6.3 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 15 7. DWELL TIME OF HOPPING CHANNEL .......................................................................................................... 19 7.1 STANDARD APPLICABLE ....................................................................................................................................... 19 7.2 TEST PROCEDURE ................................................................................................................................................. 19 7.3 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 20 8. 20DB BANDWIDTH ............................................................................................................................................... 27 8.1 STANDARD APPLICABLE ....................................................................................................................................... 27 8.2 TEST PROCEDURE ................................................................................................................................................. 27 8.3 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 28 9. RF OUTPUT POWER ................…

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Report No.: S EXHIBI Conducted Radiation E SWTX19X10 T 4 - TES Emission Te Emission Tes 0071446W-1/2 ST SETUP est Setup st Setup (Belo 2 P PHOTO ow 30MHz) OGRAPH HS Model: L FCC LM074-0190 C Part 15.247 Report No.: S Radiation E Radiation E SWTX19X10 Emission Tes Emission Tes 0071446W-1/2 st Setup (30M st Setup (1GH 2 MHz to 1GHz Hz to 18GHz z) z) Model: L FCC LM074-0190 C Part 15.247 Report No.: S Radiation E SWTX19X10 Emission Tes 0071446W-1/2 st Setup (Abo 2 ove 18GHz) Model: L FCC LM074-0190 C Part 15.247