esp32cam - psram: PSRAM ID read error: 0xffffffff

[Esp32Rk]

Hi,
i've some AiThinker Esp32cam working here.
Last week i ordered 3 new Esp32Cams.

If connecting them with the dev board to USB
in the arduino console this Error Appears: E (60) psram: PSRAM ID read error: 0xffffffff

The Blink example works on all three modules

After flashing with a Esp32cam Sketch

Code: Select all

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1344
load:0x40078000,len:13836
load:0x40080400,len:3608
entry 0x400805f0
E (197) psram: PSRAM ID read error: 0xffffffff


##################################
Internal Total heap 300416, internal Free Heap 275108
SPIRam Total heap 0, SPIRam Free Heap 0
ChipRevision 3, Cpu Freq 240, SDK Version v4.4.3
Flash Size 4194304, Flash Speed 80000000
##################################


E (361) cam_hal: cam_dma_config(306): frame buffer malloc failed
E (362) cam_hal: cam_config(390): cam_dma_config failed
E (362) camera: Camera config failed with error 0xffffffff
Camera init failed with error 0xffffffff

I put in some debug lines for the PSRAM
I've used the #define CAMERA_MODEL_AI_THINKER definition (and all others also)

I bought this cam
https://www.ebay.de/itm/275089433206?var=575380263971
Parameter

Working Voltage 4.75-5.25V
SPIFlash Default 32Mbit
RAM Internal 520KB+ 8MB PSRAM

Any advise/ideas?
I'm a beginner with Esp and Arduino programming