"Send array attempt 1 Start array transfer for /pic225.jpg" after that serial note device Freeze.

[rtarta]

Hi Dear @StuartsProjects first of all i want to thank you for your project. SX127X series transmeter esp32cam (project example no: 240) after a while device freeze. I think that ARsendArray at method. Do you have any recommend for that case ?:

Send with LoRa /pic225.jpg
Send array attempt 1
Start array transfer for /pic225.jpg

[StuartsProjects]

So its taken and transferred 224 pictures and then stops.

If you restart it does it stop at other numbers of transfers less than 225 or more than 225.

What are you transfering the pictures too ?

[rtarta]

@StuartsProjects Yes it takes after awhile it stops. when restart it continue to sending picture number may change. Picture size max 60 KB each 2 minute . but let me test more time.

[rtarta]

@StuartsProjects Hi, i figured out that image size more than 64KB that freeze. File size affect the start transmission. Do you have any recommendation about that case ?

[rtarta]

@StuartsProjects i got the problem with SX1278 in SX127XLT::CRCCCITT size overload is small for getting data over 64KB. I have change uint16_t to uint32_t libraryCRC and index variable it worked but now stops on 128 KB image. what if i want to change them to uint64_t ?.

[StuartsProjects]

Changing the index to uint32_t allows the function to read an array that is 4,294,976,295 bytes long way more memory that is on the ESP32.

Changing the index to uint32_t work for me, I have had the 240 sketch running for some hours, saving files that are 170.000bytes +.

Where does you program stop ?

What changes to the settings for the camera did you make ?

[rtarta]

Device stop inside ARtransferIRQ.h: => ARstartArrayTransfer method. (Line 315) Below changed the code
` //In File ARtransferIRQ.h: bool ARsendArray(uint8_t ptrarray, uint32_t arraylength, char filename, uint8_t namelength);

//In File SX127XLT.cpp uint32_t SX127XLT::CRCCCITT(uint8_t *buffer, uint32_t size, uint32_t startvalue) {

ifdef SX127XDEBUG1

Serial.println(F("CRCCCITT() "));

endif

uint32_t index, libraryCRC; uint8_t j;

libraryCRC = startvalue; //start value for CRC16

for (index = 0; index < size; index++) { libraryCRC ^= (((uint32_t)buffer[index]) << 8); for (j = 0; j < 8; j++) { if (libraryCRC & 0x8000) libraryCRC = (libraryCRC << 1) ^ 0x1021; else libraryCRC <<= 1; } }

return libraryCRC; }` Camera Config as Below changed the grab mode and fb_count

config.ledc_channel = LEDC_CHANNEL_0; config.ledc_timer = LEDC_TIMER_0; config.pin_d0 = Y2_GPIO_NUM; config.pin_d1 = Y3_GPIO_NUM; config.pin_d2 = Y4_GPIO_NUM; config.pin_d3 = Y5_GPIO_NUM; config.pin_d4 = Y6_GPIO_NUM; config.pin_d5 = Y7_GPIO_NUM; config.pin_d6 = Y8_GPIO_NUM; config.pin_d7 = Y9_GPIO_NUM; config.pin_xclk = XCLK_GPIO_NUM; config.pin_pclk = PCLK_GPIO_NUM; config.pin_vsync = VSYNC_GPIO_NUM; config.pin_href = HREF_GPIO_NUM; config.pin_sscb_sda = SIOD_GPIO_NUM; config.pin_sscb_scl = SIOC_GPIO_NUM; config.pin_pwdn = PWDN_GPIO_NUM; config.pin_reset = RESET_GPIO_NUM; config.xclk_freq_hz = 20000000; config.pixel_format = PIXFORMAT_JPEG; //YUV422,GRAYSCALE,RGB565,JPEG config.grab_mode = CAMERA_GRAB_LATEST;

// Select lower framesize if the camera doesn't support PSRAM if (psramFound()) { config.frame_size = FRAMESIZEHD; // FRAMESIZE + QVGA|CIF|VGA|SVGA|XGA|SXGA|UXGA config.jpeg_quality = 7; //0-63 lower number means higher quality config.fb_count = 2;

[StuartsProjects]

uint32_t index, libraryCRC;
uint8_t j;

Thats is not correct.

Its index only that needed changing to uint32_t, libraryCRC needs to stay at uint16_t, this is how the code should look;

uint32_t index;
uint16_t libraryCRC;
uint8_t j;

Can you restrict changes to the 240 Sketch to only those affecting the image resolution or size. I have not tested items such as changing the grab mode, and neither do I support them. The ESP32CAM part of the code is from the RandowNerdTutorials site, if you want support for ESP32CAM specific issues then maybe ask them.

[rtarta]

Thank you for you details, i will change as you recommend. Camera config only for taking the best frame in tutorial camera RandowNerdTutorials, camera takes first frame and that is Green tint so image is little bir green. For getting best image frame i changed. 🙏 config.grab_mode = CAMERA_GRAB_LATEST; config.fb_count = 2; Let me try and update you.

[rtarta]

@StuartsProjects Below i got error but not freeze the device as updated the code above comment. Now getting ERROR destination array and local array CRCs do not match. File size 168228 bytes. Can you update me if possible what is the reason. thanks.

18:50:23.025 -> Send with LoRa /img164_2769DBBAFE5C.jpg 18:50:23.025 -> Send array attempt 1 18:50:23.025 -> Start array transfer for /img164_2769DBBAFE5C.jpg 18:50:23.058 -> Send open remote file request 18:50:23.091 -> Send attempt 1 18:50:23.123 -> Array write started OK on remote 18:50:23.156 -> Source array length 168228 bytes 18:50:23.156 -> Source array CRC is 0xEDCD 18:50:23.156 -> Segment Size 245 18:50:23.156 -> Number segments 687 18:50:23.156 -> Last segment size 158 18:50:23.156 -> 0 18:50:23.255 -> 1 18:50:23.387 -> 2

---

---

18:51:40.714 -> 686 18:51:40.817 -> Send end array write 18:51:40.916 -> Array write ended OK on remote 18:51:40.916 -> Acknowledged remote destination file length 168228 18:51:40.916 -> Destination array and local array lengths match 18:51:40.916 -> Acknowledged destination array CRC 0x9210 18:51:40.916 -> 18:51:40.916 -> ERROR destination array and local array CRCs do not match 18:51:40.916 -> Restarting transfer 18:51:40.916 -> 18:51:40.948 -> Send array attempt 2 18:51:40.948 -> Start array transfer for /img164_2769DBBAFE5C.jpg 18:51:41.014 -> Send open remote file request 18:51:41.014 -> Send attempt 1 18:51:41.522 -> Send open remote file request 18:51:41.556 -> Send attempt 2 18:51:42.027 -> Send open remote file request 18:51:42.060 -> Send attempt 3 18:51:42.563 -> Send open remote file request 18:51:42.597 -> Send attempt 4 18:51:43.136 -> Send open remote file request 18:51:43.136 -> Send attempt 5 18:51:43.610 -> 18:51:43.610 -> ERROR writing to remote array 18:51:43.610 -> Restarting transfer 18:51:43.610 -> 18:51:44.592 -> /img164_2769DBBAFE5C.jpg Send picture failed 18:51:44.626 -> **** 18:51:44.626 -> ERROR - Take picture send failed

[StuartsProjects]

I have never seen that error, what are you using as the receiver ?

Can you go back to the original sketch 240, and only change line 276 to;

config.frame_size = FRAMESIZE_UXGA;

And line 277 to;

config.jpeg_quality = 4;

As I can see you have made other changes to the provided sketch.

The two changes above should give a file of about 160,000 bytes.

[rtarta]

Hi, i have started from examples from library and did as you said. I got below result. My lora device is LoRa-02 SX1278 433 MHZ.

21:52:19.848 -> 401 21:52:19.980 -> 402 21:52:20.078 -> 403 21:52:20.176 -> 404 21:52:20.207 -> 405 21:52:20.240 -> /pic3.jpg end array write request 21:52:20.240 -> ARDTDestinationArrayLength 99243 21:52:20.272 -> Destination arrayCRC 0x5223 21:52:20.272 -> Array write ended 21:52:20.272 -> Transfer time 45903mS 21:52:20.272 -> Destination array length 99243 bytes 21:52:20.272 -> Source array length 99243 bytes 21:52:20.272 -> Array lengths match 21:52:20.272 -> Destination array CRC is 0x5223 21:52:20.272 -> Source array CRC is 0xE35B 21:52:20.272 -> ERROR - array CRCs do not match 21:52:20.304 -> Returned picture length 99243 21:52:20.370 -> SD Card OK 21:52:20.370 -> /pic3.jpg Save picture to SD card 21:52:20.927 -> /pic3.jpg Saved to SD 21:52:20.927 -> 21:52:20.927 -> LoRa file transfer receiver ready

[rtarta]

Dear @StuartsProjects in 241 Receiver const uint32_t ARDTarraysize = 0x20000; was like that even i tried to send it does not get the file so i change the value to 0x40000 now its working. Thanks for your supports.

[StuartsProjects]

I have tested revised examples and library file ARtransferIRQ.h which allow for much larger images to be sent. I have tested for SX127x but before publishing the update I need to check the changes against SX126x and SX128x.

[rtarta]

Thank you, i am closing that case related with SX127X. thank you for your supports.