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LoRa (Long Range) is a wireless networking topology that focuses on low power and long range. It is frequently associated with M2M (machine-to-machine) and IoT (internet of things) networking technologies.

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I am working with the STM32WL55CC (48-pin package). When I imported the official STM32CubeWL example projects from ST, I noticed that they provide both SINGLE CORE and DUAL CORE versions. But the ...
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I've recently been working with Multitech's MTXDOT A00-1 LoraWAN modules along with my RAKWireless WisGate Edge Lite 2 And I've noticed an issue with Multitech's modules: The modules connect to the ...
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I have 2 Raspberry Pi Picos communicating with the RadioHead library via LoRa RFM95 boards. I am trying to replicate the library on STM32F446RE, so that it can be the sender. Try as I might I can't ...
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I have an existing design for a wireless fireworks firing system (remote and field module) that use RFM69HCW packet radio(s) @ 915MHz to transmit wireless commands to each other. I recently upgraded ...
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I am trying to put together a testbed for a multihop LoRa network. The best solution I've come up with so far is to do the first hop wired, and the second hop over the air. That way there is no ...
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I'm trying to get two Ebyte E22-900M30S modules (based on Semtech SX1262) to communicate using STM32F103RET6 microcontrollers and bit-banged (software) SPI. I'm not using the UART firmware version of ...
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I’m building a long-range wireless link to forward Modbus-RTU data from an MPPT charge controller over LoRa. I’ve wired up one SX1262-LoRa-DTU to the MPPT’s RS-485 bus and one USB-TO-LoRa-xF on my PC, ...
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I'm trying to learn about how the LoRa transmission standard works. I am familiar with the concept of bit, symbol and chip. I understand that the chip rate (number of frequency jumps per second) is ...
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I have designed a node/gateway Lora network for my farm sensors It is based in the ra-01sch LoRa module that uses Semtech LLCC68 LoRa transceiver chipset This has been working well with simple spring ...
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This is an antenna for 868 MHz (WmBus) receiver. It is usually mounted on a m2 thread on a magnetic mount. Somehow several antennas "gone missing", only the magnetic mount is left. The ...
Lenne's user avatar
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Question originally asked here. I'm looking to increase the throughput of my LoRa signal by using GFSK. I'm new to LoRa and have no experience managing radio signals. I'm a programmer though and would ...
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I'm having trouble with a problem that I don't know how to investigate anymore. I created a board based on the ESP32 with LoRa (915 MHz) and a step up (MT3608) to use in 4-20 mA current sensors. The ...
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I have a few questions on designing a custom PCB for the szx1276 for my application using the ESP32S3 MCU. I am using the reference design [SX1276RF1IAS - 169/868 MHz with TCXO] from Semtech website. ...
Dev's user avatar
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Some collaborators and I are working on a sensor device. We plan on using Seeed studio's Wio E5 mini, but we are struggling a bit with getting a good range on our communication. We are utilising Jan ...
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Im using t3s3 esp32s3 lora module and i have question can i solder dirrectly bme280 sensor and then redefine code or should i wire them separately on. And how should i know which pins are scl and sda ...
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I am working on a project to convert a wired system to wireless. The setup consists of a master device that transmits a data packet of 30 bytes to 2000 devices. The maximum distance between the master ...
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Well, I'm developing a system for reading sensors and sending them to a server. I'm using a GSM LTE module to do this sending. At first it worked well, but after a while the system stopped sending ...
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I want to assgin MISO pin for LoRa-E5 DevBoard on pin PC2, but it is not possible to find pin PC2 on LoRa-E5 DevBoard from schematic of LoRa-E5 DevBoard, although in Pin Diagram in STM32CubeIDE have ...
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I am getting ready to bring an electronic device using SX1276 Lora radio to market. The FCC testing lab has requested that I be able to put the radio into the following configuration: 100% Duty Cycle ...
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Often after transmitting a message on the sx1276 operating in LoRa mode, the sx1276 is put in receive mode to allow receiving a message. Empirically, I have found that the opreg can be written to ...
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I am using an SX1276 chip from Paradisetronic. I adapted the Arduino RadioLib library to my board (Beaglebone Black Rev C). I noticed that the IRQ flags will not be cleared. According to the manual (...
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I'm a novice who's looking to jump in the (low power) deep end. I want to create a breakout board for a Heltec HT-CT62 module. I would like to know if I need to integrate the entire power schematic ...
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I'm currently examining the reference design schematics from ST, available at en.MB1389-WL55JC-highband-E02_Schematic. In the schematics, the EXTERNAL HSE CLK with TCXO configuration is linked to the ...
Atrahasis's user avatar
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I am having troubles trying to send a LoRa packet to a receiver. In the serial monitor I am stuck in the while loop and it keeps printing dots. Below is my code and I will attach a photo of the eagle ...
Maren's user avatar
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I need to place LoRa module on the PCB I designed. There is already an RFID antenna on this PCB that I designed before, and it is not possible to change its location. Is the distance between LoRa ...
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I have an ebyte's E32-900T30D module (based on Semtech's sx1276) that I plan to use in a project, and I've got totally confused about presence (or absence) of built in encryption in it. Each and every ...
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I'm currently working on a project that involves establishing a reliable non-line-of-sight wireless communication link with a range of 1 kilometer or more. The project does not have internet access, ...
Lakshmi Vara Prasad Guduru's user avatar
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I'm currently working on designing a wireless communication system for remote environmental monitoring, aiming to gather data from an open area approximately 1 kilometer away. The system needs to ...
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I am using 3 STM32WL55JC1. One for base station and the other two's for sensor node. Everything was fine but then I started UART communication between base station and ESP32. I started coding ESP32 so ...
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I'm making a little scanning beacon gizmo. When a laser shines on it from ~40m away, it is supposed to transmit its ID and HIGH (1) to the laser controller ~40m away. Otherwise, transmit 0 or nothing. ...
Popeye's user avatar
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I am designing a PCB following the RX1276 reference design. There are 6 reference designs presented on their website: https://www.semtech.com/products/wireless-rf/lora-connect/sx1276 Pick any of the 6 ...
Learning Python's user avatar
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I want to use this radio module and this antenna and this extender for my diy RC. Is this possible, and how would I connect the extender to my radio module? Can I cut the U.FL side and solder them ...
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I am working with 3 STM32WL55JC modules. 1 used as receiver and the other 2 as transmitters. The code: ...
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I am trying to create a form of FSCM (frequency shift chirp modulation) based on LoRa principle just to learn from it and to obtain a deeper understanding. What I do not get: why is (or must be?) the ...
Mart's user avatar
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Recently, I have been reading about the LoRa modulation and I am curious, why the symbol transmission time (T_symbol) doubles, if the Spreading Factor (SF) is increased by one. The SF is equal to the ...
pstr's user avatar
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I searched the datasheet of the Semtech SX1280, but I can't find the output impedance of the SX1280 (RFIO's pin). Where can I find it?
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I want to add LoRa support to a PCB design of mine, and because I'm fabricating at JLCPCB, I am considering the following components (since they are well stocked): DL-RFM95-868M LoRa module AN1603-...
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I usually pay attention to RF PCBs. This shape is like a hole, but it is not, the ground surface is used in the form. What is the purpose of making these holes? How can I make them easily with the ...
mehmet's user avatar
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I have some battery-powered devices in a LoRa network with a custom gateway (my own PCBs) and was wondering if it's possible for the gateway to wake the other devices using a modulated 433 MHz signal (...
Scott Porter's user avatar
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In India the allowed Lora frequency is between 865-867 MHZ and the module E32-868T30D is advertised for 868 MHZ. I am not sure if we can use the board within the specified range as mandated by Indian ...
Suresh Kumar's user avatar
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I am using a Microchip RN2483 LoRa module and I observed a very high TX current consumption, >400mA, sometimes 500mA. It doesn't happen systematically but when it does, it seems to affect every ...
sydpy's user avatar
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I have 2 lora module. I want to use one of them as receiver and the other one as transmitter. I can do this with 2 Arduino uno but I want to use one STM32 board as transmitter and Arduino uno board ...
Tryingtogetsome's user avatar
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I want to add a wireless M-BUS to the PCB I designed, but they are very expensive (about $30). While researching wireless M-BUS modules, a question came to my mind. When I look at the datasheet of the ...
harmonica's user avatar
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I came across the schematic of RAK3272-Sip development board, but I couldn't identify the value of this inductor. Here's a link that contains the full schematic.
Gdee's user avatar
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I'm thinking of adding LoRa module to the PCB I designed, and I chose an antenna. NN02-201 The reason I chose this antenna is because I can easily find it in the country I live in. However, LoRa is ...
harmonica's user avatar
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I am working on a ultra low power project where portability and low weight is important. The circuit would have multiple ICs, that need to communicate over multiple frequencies: Esp32 - WiFi/Bt 2.4 ...
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I've got some LoRa boards that claim 20 dBm transmit power. They do indeed show ~100 mW output power on an old-school moving-coil RF wattmeter. However, on a spectrum analyser with 20dB + 30dB ...
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Is it possible to implement an SPI module such as a LoRa module, eg. RFM95, without the use of a [modern] microcontroller? Edit: I have a hobby project that’s using a Z80 CPU. The most available/...
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I'm trying to design a schematic of 3 Watt device using an SX1261 radio transceiver. For the power amplifier, I've chosen CMX902. I'm a little bit confused about the schematic I'm drawing, is it ...
MS-Hossen's user avatar
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I made the RFM96 LoRa Radio Module by adafruit communicate to each other. The next step I want to do is connect to it to a gateway, which is either the RAK7371 Developer Base or RAK2287 Concentrator ...
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