Arducam Mini 2MP camera module is obsolete the official demo seem not work with the new Arducam Mini 2MP Plus camera

Question

Since the Mini 2MP is obsolete 
 Via this link https://www.amazon.com/Arducam-Module-Megapixels-Arduino-Mega2560/dp/B012UXNDOY only can buy Mini-2MP-Plus 
 The official git source https://github.com/NordicPlayground/nrf52-ble-image-transfer-demo and Jimmy https://github.com/jimmywong2003/nrf52-ble-image-transfer-demo/network fork seem can't normally work with the APP source https://github.com/NordicPlayground/Android-Image-Transfer-Demo 
 
 I already test the Mini-2MP-Plus device with Arduino and confirmed the camera work. 
 But run the demo whatever official or Jimmy fork the APP after connect have not any image display. 
 
 Thanks 
 Best Regards 
 David Chan

chanffdavid · Accepted Answer

When run the Android Image Transfer Demo and capture image got following error

2019-04-02 14:47:19.432 11738-11738/com.nordicsemi.ImageTransferDemo W/image_transfer_main: First packet received: 244 bytes
2019-04-02 14:47:19.583 11738-11738/com.nordicsemi.ImageTransferDemo W/image_transfer_main: attempting JPEG decode
2019-04-02 14:47:19.583 11738-11738/com.nordicsemi.ImageTransferDemo D/skia: libjpeg error 68 <Unsupported marker type 0x68> from output_message
2019-04-02 14:47:19.583 11738-11738/com.nordicsemi.ImageTransferDemo D/skia: libjpeg error 68 <Unsupported marker type 0x68> from setjmp

ovrebekk · Answer

Hi David 
 I have heard reports earlier that to make the Mini-2MP-Plus module work it is necessary to comment out the following line of code in the main.c file: arducam_mini_2mp_fillBuffer (img_data_buffer, 1 ); 
 Can you try to make this change and see if it is sufficient? 
 The older module added a byte at the start of the buffer that needed to be flushed, while the plus module doesn't. 
 Best regards Torbjørn

ovrebekk · Answer

Hi David 
 I don't see why reading multiple bytes over the SPI should be an issue, unless you have a signalling issue between the DK and your sensor. 
 Could you try to reduce the SPI frequency, and see if this makes a difference? 
 To do that just change this line in ArduCAM.c and recompile your code. 
 You can try NRF_SPIM_FREQ_1M for instance. 
 I will also reach out to Jimmy and hear if he encountered similar issues. 
 Best regards Torbjørn

Arducam Mini 2MP camera module is obsolete the official demo seem not work with the new Arducam Mini 2MP Plus camera

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