I have a problem with the module Grove LoRa 433mhz Module’s link
I plugged the module on a UART of Grove Meda shield, I use sketch examples (RF95_client / RF95_server) of seeeds library and it says “Init failed”.
What should I do to correct it?
Thank for your help
(I hope you can understand me, I’m french and I can’t speak english very well)
Here is the sketch [code]// rf95_client.pde
// -- mode: C++ --
// Example sketch showing how to create a simple messageing client
// with the RH_RF95 class. RH_RF95 class does not provide for addressing or
// reliability, so you should only use RH_RF95 if you do not need the higher
// level messaging abilities.
// It is designed to work with the other example rf95_server
// Tested with Anarduino MiniWirelessLoRa
#include <SoftwareSerial.h> #include <RH_RF95.h>
// Singleton instance of the radio driver
SoftwareSerial ss(5, 6);
RH_RF95 rf95(ss);
if (!rf95.init())
{
Serial.println("init failed");
while(1);
}
// Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on
// The default transmitter power is 13dBm, using PA_BOOST.
// If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then
// you can set transmitter powers from 5 to 23 dBm:
//rf95.setTxPower(13, false);
rf95.setFrequency(434.0);
}
void loop()
{
Serial.println(“Sending to rf95_server”);
// Send a message to rf95_server
uint8_t data[] = “Hello World!”;
rf95.send(data, sizeof(data));
rf95.waitPacketSent();
// Now wait for a reply
uint8_t buf[RH_RF95_MAX_MESSAGE_LEN];
uint8_t len = sizeof(buf);
if(rf95.waitAvailableTimeout(3000))
{
// Should be a reply message for us now
if(rf95.recv(buf, &len))
{
Serial.print("got reply: ");
Serial.println((char*)buf);
}
else
{
Serial.println("recv failed");
}
}
else
{
Serial.println("No reply, is rf95_server running?");
}
delay(1000);
Can I do the same setup as Damder (the initial one) but plug the Lora Grove to the I2C.
It is written in the documentation of Seeeduino V4.2 that I2C SCL and SDA are connected to A4, A5.
Why it doesnt work if I do
Hello, can I connect the Grove - LoRa Radio 433 MHz to my Arduino Uno R3 directly through RX and TX ports present in the board, if I don’t have the UART interface? I want to communicate two LoRa Radios successfully. Kindly someone assist me. It’s very urgent.
Hi @tiwari73rajesh, Sorry I didn’t get your question. if you looking for UART port’s, then you can use the SoftwareSerial() and you can use your GPIO pins as UART!
The Arduino hardware has built-in support for serial communication on pins 0 and 1 (which also goes to the computer via the USB connection). The native serial support happens via a piece of hardware (built into the chip) called a UART.
This hardware allows the Atmega chip to receive serial communication even while working on other tasks, as long as there room in the 64 byte serial buffer.
The SoftwareSerial library has been developed to allow serial communication on other digital pins of the Arduino, using software to replicate the functionality (hence the name “SoftwareSerial”). It is possible to have multiple software serial ports with speeds up to 115200 bps. A parameter enables inverted signalling for devices which require that protocol.
I am using Arduino Uno R3. Actually, I don’t currently have UART interface devices like Seeeduino lotus or Grove Base Shield V2.0. So I am trying to use the Grove - LoRa Radio 433 MHz by connecting it to the RX (0) and TX (1) ports available on my board (as you know that one RX and one TX port is available in an Arduino Uno Board). But I’m not able to perform successful client test.
This is my question. How to perform successful client-server test and use the the LoRa radio, without any UART interface, by connecting it directly to the Arduino UNO board?
I am facing problems and for clearing my confusions, I need a detailed procedure and guidance. I’d be very grateful to you.
Are you getting any error or something? If yes please share the error!
Since the Grove LoRa Radio is requiring UART port, you need to use that, otherwise, you need to use the RFM95 Module via SPI, which required modification and soldering and all.
Nope… Codes of both the client as well as the server were compiled and uploaded successfully to the boards.
As seen in the pictures uploaded by me, I am not using any UART interface or SPI or converters. Neither I have any of these devices available with me right now nor can I get them now, so I am trying to use the transceiver with the help of the RX(0) and TX(1) ports available on the arduino boards. Kindly assist me on how to use this without any extra conversion devices. If you want I can send you my connecting pattern also.
@tiwari73rajesh The UART interface has the pin’s named Rx and Tx since you already connected to Rx and Tx , so you already connected via UART interface.
If you facing transmission issues, check the jumper cable continuity and make sure that all are good.
I’ve fitted all the jumper cables precisely and in the right manner…
What to do?
This is the most I could do… Not beyond this … I’m trying…
Attached the output of failed communication
… I’m trying…
