User Manual for VM 1W LoRa Water/Gas module Last updated on: 11/04/2020 Power connection for the module The power connection utilizes a 2-pin connector (part S2B-PH-SM4-TB) that is normally used to connect a 3.6V battery. There are 2 such connectors in opposing orientation. The polarity is marked in the picture below (black = ground, red = positive, 3.6V).
Programming header and programming cable
Programming instructions Download and install ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 https://www.st.com/en/development-tools/stsw-link004.
Power up the modem and connect the ST link/V2 programmer to the module as shown in the picture. The mini USB connector of the programmer is connected directly to a PC or laptop. Software instructions: ST link utility software layout Click ‘connect to target button’.
Go to file-→open file and load the firmware bin file. If the firmware is loaded successfully the debug window looks like this. Click ‘program verify’ icon A window appears, verify if the settings are similar to what’s shown in the picture Click start, this will start flashing the firmware.
Click ‘disconnect from device’ icon. Now the programming cable can be removed from the module and the module is ready for testing. Firmware bin file details: The firmware files that will enable transmissions in fixed frequencies are named as follows: VM_WTRGAS_FCC_LOW (transmit at 902.3Mhz) VM_WTRGAS_FCC_MID (transmit at 908.5Mhz) VM_WTRGAS_FCC_HIGH (transmit at 914.9Mhz) The firmware file that will enable the module to hop in 64 channels between (902.3 and 914.
Modulation method This Device uses Frequency Hopping Spread Spectrum (FHSS) as its modulation technique. The list of frequencies are as follows: 902.3 902.5 902.7 902.9 903.1 903.3 903.5 903.7 903.9 904.1 904.3 904.5 904.7 904.9 905.1 905.3 905.5 905.7 905.9 906.1 906.3 906.5 906.7 906.9 Frequency in Mhz 907.1 908.7 907.3 908.9 907.5 909.1 907.7 909.3 907.9 909.5 908.1 909.7 908.3 909.9 908.5 910.1 910.3 910.5 910.7 910.9 911.1 911.3 911.5 911.7 911.9 912.1 912.3 912.5 912.7 912.9 913.1 913.3 913.
LoRa® Modem 168 dB maximum link budget +20 dBm - 100 mW constant RF output vs. V supply +14 dBm high efficiency PA Programmable bit rate up to 300 kbps High sensitivity: down to -148 dBm Bullet-proof front end: IIP3 = -11 dBm Excellent blocking immunity Low RX current of 9.
Integration instructions for host product manufacturers according to KDB 996369 D03
2.2 List of applicable FCC rules CFR 47 FCC PART 15 SUBPART C has been investigated. It is applicable to the modular Transmitter 2.3 Specific operational use conditions This module is stand-alone modular. If the end product will involve the multiple simultaneously transmitting condition or different operational conditions for a stand-alone modular transmitter in a host, host manufacturer have to consult with module manufacturer. 2.4 Limited module procedures This module is Limited module procedures. 2.
INSTRUCTION TO THE USER This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
