Grove is a very powerful platform developed by Seeed Studio to simplify your IoT projects.We have integrated the grove connector to most boards produced by Seeed to make them become a system. This time, we combined Grove with LoRa to provide an ultra-long-range wireless module for you.
The main functional module in Grove - LoRa Radio 433MHz is RFM98, which is a transceiver features the LoRa long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst mini-missing current consumption. The heart of Grove - LoRa Radio 433MHz is ATmega168, a widely used chip with very high-performance and low power consumption, especially suitable for this grove module.
There we already integrated a simple wire antenna to receive signal, if the signal is too weak to receive, don’t worry, the MHF connector next to the antenna is for adding a second antenna which has MHF interface to gain more signal.
This is the 433MHz version, which can be used for 433MHz communication. You can also find the version for 868MHz at Grove - LoRa Radio 868MHz.
Please keep the antenna vertical to the board and as straight as possible to make the best performance.
Please avoid making any big metal object near the antenna and a metal cape is also not recommended if you need to add a cape for your device.
Using RFM95 module based on SX1276 LoRa®
~28mA(Avg) @+20dBm continuous transmit
~20mA(Avg) @receive mode, BW-500kHz
Simple wire antenna or MHF Connector for external high gain antenna
+20dBm - 100 mW Power Output Capability
|Dimensions||40mm x20mm x15mm|
|Working Temperature||Working Temperature：-20 – 70℃|
|Grove - LoRa Radio 433MHz||1|
Grove - LoRa Radio 433MHz
Wiki of Grove - LoRa Radio 433MHz
Hi, i got the lora module connected to my arduino uno. RX to pin 5 en TX to pin 4. I used the library client and server but got an init error. Does someone know why?Question by: admin on 2018-12-18 02:30:37
Hi there~ Please tell us more about the detail, you can contact us through email # email@example.com# And please upload your the detail of error code ,you can give us a screenshot of copy the text. RegardsAnswer by: admin on 2018-12-18 02:30:37
Question by: admin on 2018-12-18 02:30:37
Please refer to the last reply, Thanks.Answer by: admin on 2018-12-18 02:30:37
Hi every one, I have some questions: 1. Does some body knows if these modules work in transparent mode? 2.With line of view , how many distance may I communicate 2 or more modules? 3. Is it possible to do a multi point communication between these modules? 4. May I coded the modules (network ID) as with a Xbee module? Thanks.Question by: admin on 2018-12-18 02:24:14
it is around 1~2KM distance. it can be one sending and multiple receiving. thanks.Answer by: admin on 2018-12-18 02:24:14
(CONTINUED) I've already implemented part of the network with the gateway and three devices (with no problems for the moment) with my own personal system of error control and packet identification, I need to do it or it's already implemented in the RF97 protocol at low level? Obviously the data send from devices it's not data critical and some packet can be lost.Question by: admin on 2018-12-18 02:24:07
Please refer to 18.104.22.168. Coding Rate ** To further improve the robustness of the link the LoRaTM modem employs cyclic error coding to perform forward error detection and correction**. For more info, please refer to **http://www.hoperf.com/upload/rf/RFM95_96_97_98W.pdf** thanks.Answer by: admin on 2018-12-18 02:24:07
I'm building a little domestic LoRa network, I would want to use a lora module (mounted onto a SAMD board) as "gateway" that will route oncoming RF packets RF to a MQTT server; I've some RF devices on my network that asynchronously sends data... so, my question is: what appen if multiple devices transmit at the same time? The LoRa RF97 protocol are packetized or raw? it have some error control? (PART 1)Question by: admin on 2018-12-18 02:24:07
Hi there, it is RFM98 module inside of Lora radio 433Mhz. Please refer to 22.214.171.124. Coding Rate ** To further improve the robustness of the link the LoRaTM modem employs cyclic error coding to perform forward error detection and correction**. For more info, please refer to **http://www.hoperf.com/upload/rf/RFM95_96_97_98W.pdf** thanks.Answer by: admin on 2018-12-18 02:24:07