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+# IPC-RM1-BLK7202V3-M43A-WIFI
+- [Overview](#overview)
+  - [Device info](#Device-info)
+- [Connectors](#Connectors)
+  - [Front side](#Front-side)
+  - [Back side](#Back-side)
+- [GPIOs](#GPIOs)
+  - [Muxing](#Muxing)
+  - [SD Card](#SD-Card)
+  - [Speaker](#Speaker)
+- [Flashing](#Flashing)
+  - [Flash memory layout](#Flash-memory-layout)
+- [Summary](#Summary)
+- [TODO](#TODO)
+
+# Overview
+Board found in cheap indoor Cootli WiFi PTZ cam. Board looks very similar to [XM IPG-G4-WR-BL](http://baike.xm030.cn:81/%E4%BA%A7%E5%93%81%E5%8F%82%E6%95%B0/English/IPG%E6%A8%A1%E7%BB%84/Parameters%20for%20IPG-G4-WR.pdf) but PCB layout a bit different.
+
+All tests are complete on [gk7202v300_lite_cootli_camv0103-nor](https://github.com/OpenIPC/builder/releases/download/latest/gk7202v300_lite_cootli_camv0103-nor.tgz) firmware (build Feb 8 2024).
+
+## Device info
+| System | Description | Comments | 
+|-|-|-|
+| SoC | GK7202V300 | |
+| Flash | XMC XM25QH64CHIQ | 8MB |
+| Sensor | SmartSens SC223A* | 1920x1080 |
+| Audio | MIC + SPK | |
+| Storage | Micro SD | |
+| LAN | - | - |
+| WiFi | iComm SV6355 | UF.L (IPX) |
+| BT | +? | +? |
+| Motors | 2x Stepper | GPIO + ULN2803A |
+| Dimensions | 38 x 54 mm | |
+
+\* - reported by ipctool
+
+Front side
+![Front side](../images/device-IPC-RM1-BLK7202V3-M43A-WIFI_front.jpg)
+
+Back side
+![Back side](../images/device-IPC-RM1-BLK7202V3-M43A-WIFI_back.jpg)
+
+PCB markings
+![PCB markings](../images/device-IPC-RM1-BLK7202V3-M43A-WIFI_markings.jpg)
+
+# Connectors
+Connectors type JST 1.25mm
+![JST Connector](../images/device-IPC-RM1-BLK7202V3-M43A-WIFI_connectors.jpg)
+
+## Front side
+| Connector | Type |
+|:-:|:-|
+| IRCUT | 2pin JST |
+| LED | 5pin JST |
+| MIC | 2pin JST |
+
+## Back side
+- Micro SD Card Socket
+- UART (unsoldered, to the left of SPK, pin1 RX, pin2 TX)
+
+| Connector | Type |
+|:-:|:-|
+| SPK | 2pin JST |
+| H | 5pin JST |
+| V | 5pin JST |
+| +5V | 2pin JST |
+| RF | UF.L (IPX) |
+
+# GPIOs
+| GPIO | Connector | Description |
+|:-:|:-:|:-:|
+| 0* | - | Reset button |
+| 4 | LED pin 5 | WLED |
+| 8 | WiFi module pin 3 | LO - Power ON |
+| 12 | H pin 5 | Mot H |
+| 13 | H pin 2 | Mot H |
+| 14 | H pin 4 | Mot H |
+| 15 | H pin 3 | Mot H |
+| 16 | LED pin 4 | IRLED |
+| 52 | V pin 2 | Mot V |
+| 53 | V pin 3 | Mot V |
+| 54 | V pin 4 | Mot V |
+| 55 | V pin 5 | Mot V |
+| 56 | IRCUT pin 1 | LO - IRCUT ON |
+| 57* | LED pin 3 | IRSens |
+| 58 | IRCUT pin 2 | LO - IRCUT OFF |
+| 70 | - | SD PWR (LO - Power ON) |
+| 51 | - | AUDIO AMP |
+
+\* - unconfirmed.
+
+## Muxing
+No muxing required if Majestic takes control over pins. Otherwise, muxing can be done using the following commands.
+
+Muxing GPIO16 for taking control over IRLED pin:
+```sh
+devmem 0x120c0020 32 0x432      # GPIO2_0 (GPIO16)
+```
+
+Also for motors.  
+Muxing GPIO12, GPIO14, GPIO15 (motors H connector):
+```sh
+devmem 0x120c0010 32 0x1e02     # GPIO1_4 (GPIO12)
+devmem 0x120c0018 32 0x1d02     # GPIO1_6 (GPIO14)
+devmem 0x120c001c 32 0x1402     # GPIO1_7 (GPIO15)
+```
+
+Shortly after **Loading of kernel modules...** GPIO13 turns to HI (one of motors winding constantly powered), so maybe necesary turn it to LO:
+```sh
+gpio clear 13
+gpio unexport 13
+```
+
+## SD Card
+By default SD Card unpowered, so we need turn GPIO70 to LO somehow.
+
+To poweron SD CARD from Kernel:
+```sh
+gpio clear 70
+```
+or
+```sh
+devmem 0x120B8400 32 0x40       # turn GPIO8_6 to output mode
+devmem 0x120B8100 32 0x00       # set GPIO8_6 to LO
+```
+And reattach SD card.
+
+To poweron SD CARD from U-Boot:
+```sh
+mw 0x120B8400 0x40      # turn GPIO8_6 to output mode
+mw 0x120B8100 0x00      # set GPIO8_6 to LO
+mmc rescan
+```
+
+## Speaker
+Device supports playing PCM signed 16-bit little-endian, 8000 Hz, 1CH by sending data to http://192.168.0.10/play_audio endpoint.
+
+Audio file can be encoded like this:
+```sh
+ffmpeg -i input.wav -f s16le -ar 8000 -ac 1 output.pcm
+```
+
+And send to camera's speaker:
+```sh
+curl -v -u user:pass -H "Content-Type: application/json" -X POST --data-binary @audio.pcm http://192.168.0.10/play_audio
+```
+
+# Flashing
+Stock firmware is pwd locked and LAN interface does not present, so I'm guessing following methods are available to flash this board:
+- [burn](https://github.com/OpenIPC/burn)  + [u-boot-gk7202v300-universal.bin](https://github.com/OpenIPC/firmware/releases/download/latest/u-boot-gk7202v300-universal.bin) and then upload FW via X/Y/ZMODEM (e.g. **loady**. Tip: use **baud** option for speed up) or from SD card (power supply required, [see above](#SD-Card))
+- load full image thru stock web interface (untested)
+- flash programmer
+- somehow get into stock bootloader
+
+## Flash memory layout
+| Offset | Size | Description | 
+|:-|:-|:-|
+| 0x00000000 | 0x00040000 (262144 bytes) | bootloader |
+| 0x00040000 | 0x00010000 (65536 bytes) | env |
+| 0x00050000 | 0x00200000 (2097152 bytes) | kernel |
+| 0x00250000 | 0x00500000 (5242880 bytes) | rootfs |
+| 0x00750000 | 0x000B0000 (720896 bytes) | rootfs_data |
+
+# Summary
+- [X] WiFi works
+- [X] Video tested/streamed
+- [X] Day/night works (IRCUT and IRLED)
+- [X] MIC works
+- [X] Speaker works
+- [ ] PTZ/Motors (GPIO pins found/accessible, driver untested)
+
+# TODO
+- somehow patch/adapt camhi-motor.ko, so make it works on this board.
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