# MKR1310 keeps restarting at sending

**URL:** <https://forum.arduino.cc/t/mkr1310-keeps-restarting-at-sending/648655>\
**Category:** MKR WAN 1310\
**Created:** [April 14, 2020, 12:22pm UTC](https://forum.arduino.cc/t/mkr1310-keeps-restarting-at-sending/648655 "2020-04-14T12:22:46Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![MeandMrsJones](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/meandmrsjones/32/1128244_2.png) [@MeandMrsJones](https://forum.arduino.cc/u/MeandMrsJones)\
**Post date:** [April 14, 2020, 12:22pm UTC](https://forum.arduino.cc/t/mkr1310-keeps-restarting-at-sending/648655/1 "2020-04-14T12:22:46Z")

</div>

MKR1310, LoRa receiving works great.  
Trying the simple DumbModemLoRaSender script makes my MKR1310 restarting.  
Again, receiving works good, sending is a problem.  
Any suggestions?  
Regards  
J

Also tried with lower baudrate btw.  
#include \<SPI.h\>  
#include \<LoRa.h\>

int counter = 0;

void setup() {  
Serial.begin(115200);  
while (!Serial);

Serial.println("LoRa Sender");

if (!LoRa.begin(868E6)) {  
Serial.println("Starting LoRa failed!");  
while (1);  
}  
}

void loop() {  
Serial.print("Sending packet: ");  
Serial.println(counter);

// send packet  
LoRa.beginPacket();  
LoRa.print("hello ");  
LoRa.print(counter);  
LoRa.endPacket();

counter++;

delay(5000);  
}

Dump register:

14:55:30.771 -\> LoRa Dump Registers  
14:55:31.212 -\> 0x0: 0x93  
14:55:31.212 -\> 0x1: 0x81  
14:55:31.212 -\> 0x2: 0x1A  
14:55:31.212 -\> 0x3: 0xB  
14:55:31.212 -\> 0x4: 0x0  
14:55:31.212 -\> 0x5: 0x52  
14:55:31.212 -\> 0x6: 0xE4  
14:55:31.212 -\> 0x7: 0xC0  
14:55:31.212 -\> 0x8: 0x0  
14:55:31.212 -\> 0x9: 0x8F  
14:55:31.212 -\> 0xA: 0x9  
14:55:31.212 -\> 0xB: 0x2B  
14:55:31.212 -\> 0xC: 0x23  
14:55:31.212 -\> 0xD: 0x1  
14:55:31.212 -\> 0xE: 0x0  
14:55:31.212 -\> 0xF: 0x0  
14:55:31.212 -\> 0x10: 0x0  
14:55:31.212 -\> 0x11: 0x0  
14:55:31.212 -\> 0x12: 0x0  
14:55:31.212 -\> 0x13: 0x0  
14:55:31.212 -\> 0x14: 0x0  
14:55:31.212 -\> 0x15: 0x0  
14:55:31.212 -\> 0x16: 0x0  
14:55:31.212 -\> 0x17: 0x0  
14:55:31.212 -\> 0x18: 0x10  
14:55:31.212 -\> 0x19: 0x0  
14:55:31.212 -\> 0x1A: 0x0  
14:55:31.212 -\> 0x1B: 0x0  
14:55:31.212 -\> 0x1C: 0x0  
14:55:31.212 -\> 0x1D: 0x72  
14:55:31.212 -\> 0x1E: 0x70  
14:55:31.212 -\> 0x1F: 0x64  
14:55:31.212 -\> 0x20: 0x0  
14:55:31.212 -\> 0x21: 0x8  
14:55:31.212 -\> 0x22: 0x1  
14:55:31.212 -\> 0x23: 0xFF  
14:55:31.246 -\> 0x24: 0x0  
14:55:31.246 -\> 0x25: 0x0  
14:55:31.246 -\> 0x26: 0x4  
14:55:31.246 -\> 0x27: 0x0  
14:55:31.246 -\> 0x28: 0x0  
14:55:31.246 -\> 0x29: 0x0  
14:55:31.246 -\> 0x2A: 0x0  
14:55:31.246 -\> 0x2B: 0x0  
14:55:31.246 -\> 0x2C: 0x0  
14:55:31.246 -\> 0x2D: 0x50  
14:55:31.246 -\> 0x2E: 0x14  
14:55:31.246 -\> 0x2F: 0x45  
14:55:31.246 -\> 0x30: 0x55  
14:55:31.246 -\> 0x31: 0xC3  
14:55:31.246 -\> 0x32: 0x5  
14:55:31.246 -\> 0x33: 0x27  
14:55:31.246 -\> 0x34: 0x1C  
14:55:31.246 -\> 0x35: 0xA  
14:55:31.246 -\> 0x36: 0x3  
14:55:31.246 -\> 0x37: 0xA  
14:55:31.246 -\> 0x38: 0x42  
14:55:31.246 -\> 0x39: 0x12  
14:55:31.246 -\> 0x3A: 0x49  
14:55:31.246 -\> 0x3B: 0x1D  
14:55:31.246 -\> 0x3C: 0x0  
14:55:31.246 -\> 0x3D: 0xAF  
14:55:31.246 -\> 0x3E: 0x0  
14:55:31.246 -\> 0x3F: 0x0  
14:55:31.246 -\> 0x40: 0x0  
14:55:31.246 -\> 0x41: 0x0  
14:55:31.246 -\> 0x42: 0x12  
14:55:31.246 -\> 0x43: 0x24  
14:55:31.246 -\> 0x44: 0x2D  
14:55:31.246 -\> 0x45: 0x0  
14:55:31.246 -\> 0x46: 0x3  
14:55:31.246 -\> 0x47: 0x0  
14:55:31.246 -\> 0x48: 0x4  
14:55:31.246 -\> 0x49: 0x23  
14:55:31.246 -\> 0x4A: 0x0  
14:55:31.246 -\> 0x4B: 0x9  
14:55:31.246 -\> 0x4C: 0x5  
14:55:31.246 -\> 0x4D: 0x84  
14:55:31.246 -\> 0x4E: 0x32  
14:55:31.246 -\> 0x4F: 0x2B  
14:55:31.246 -\> 0x50: 0x14  
14:55:31.246 -\> 0x51: 0x0  
14:55:31.246 -\> 0x52: 0x0  
14:55:31.246 -\> 0x53: 0x10  
14:55:31.246 -\> 0x54: 0x0  
14:55:31.246 -\> 0x55: 0x0  
14:55:31.246 -\> 0x56: 0x0  
14:55:31.246 -\> 0x57: 0xF  
14:55:31.246 -\> 0x58: 0xE0  
14:55:31.246 -\> 0x59: 0x0  
14:55:31.246 -\> 0x5A: 0xC  
14:55:31.246 -\> 0x5B: 0x0  
14:55:31.246 -\> 0x5C: 0x7  
14:55:31.246 -\> 0x5D: 0x0  
14:55:31.246 -\> 0x5E: 0x5C  
14:55:31.246 -\> 0x5F: 0x78  
14:55:31.246 -\> 0x60: 0x0  
14:55:31.246 -\> 0x61: 0x1C  
14:55:31.246 -\> 0x62: 0xE  
14:55:31.246 -\> 0x63: 0x5B  
14:55:31.246 -\> 0x64: 0xCC  
14:55:31.246 -\> 0x65: 0x0  
14:55:31.246 -\> 0x66: 0x1  
14:55:31.246 -\> 0x67: 0x50  
14:55:31.246 -\> 0x68: 0x0  
14:55:31.246 -\> 0x69: 0x0  
14:55:31.246 -\> 0x6A: 0x0  
14:55:31.246 -\> 0x6B: 0x0  
14:55:31.246 -\> 0x6C: 0x0  
14:55:31.246 -\> 0x6D: 0x0  
14:55:31.246 -\> 0x6E: 0x0  
14:55:31.246 -\> 0x6F: 0xB  
14:55:31.246 -\> 0x70: 0xD0  
14:55:31.246 -\> 0x71: 0x0  
14:55:31.246 -\> 0x72: 0x13  
14:55:31.246 -\> 0x73: 0x0  
14:55:31.246 -\> 0x74: 0x0  
14:55:31.246 -\> 0x75: 0x0  
14:55:31.246 -\> 0x76: 0x0  
14:55:31.246 -\> 0x77: 0x0  
14:55:31.246 -\> 0x78: 0x0  
14:55:31.246 -\> 0x79: 0x0  
14:55:31.246 -\> 0x7A: 0x0  
14:55:31.246 -\> 0x7B: 0x0  
14:55:31.246 -\> 0x7C: 0x0  
14:55:31.246 -\> 0x7D: 0x0  
14:55:31.246 -\> 0x7E: 0x0  
14:55:31.246 -\> 0x7F: 0x0

---

<div class="post-metadata">

**Author:** ![MeandMrsJones](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/meandmrsjones/32/1128244_2.png) [@MeandMrsJones](https://forum.arduino.cc/u/MeandMrsJones)\
**Post date:** [April 14, 2020, 5:00pm UTC](https://forum.arduino.cc/t/mkr1310-keeps-restarting-at-sending/648655/2 "2020-04-14T17:00:32Z")

</div>

pinMode(LORA\_BOOT0, OUTPUT);  
pinMode(LORA\_RESET, OUTPUT);  
In setup() seems to do the trick.

---

<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [May 7, 2021, 11:57am UTC](https://forum.arduino.cc/t/mkr1310-keeps-restarting-at-sending/648655/3 "2021-05-07T11:57:45Z")

</div>