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inbox:toh:comfast:cf-ew72_v2 [2023/08/23 12:01] – [LEDs] filimonicinbox:toh:comfast:cf-ew72_v2 [2023/08/24 10:22] – [Serial] filimonic
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 <WRAP important 60%> <WRAP important 60%>
 +{{ :media:comfast:cf-ew72-v2_label.jpg?direct&200|}}
 COMFAST CF-EW72 **without version** is completely different device.  COMFAST CF-EW72 **without version** is completely different device. 
 +
 +
 +
 Please, look for **__Model__** at the label on your device. If it says **__CF-EW72 V2__**, you should proceed with this page. Please, look for **__Model__** at the label on your device. If it says **__CF-EW72 V2__**, you should proceed with this page.
 If there is no **__V2__** you should proceed to [[toh:comfast:cf-ew72|COMFAST CF-EW72]] If there is no **__V2__** you should proceed to [[toh:comfast:cf-ew72|COMFAST CF-EW72]]
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 ^ CPU                                 ^ Ram      ^ Flash   ^ Network         ^ WLAN 2.4            | WLAN 5               ^ Serial  ^ PoE      ^ PoE Passthrough  ^ ^ CPU                                 ^ Ram      ^ Flash   ^ Network         ^ WLAN 2.4            | WLAN 5               ^ Serial  ^ PoE      ^ PoE Passthrough  ^
 | Mediatek MT7621(AT or DAT) 880 MHz  | 128 MiB  | 16 MiB  | 2x 10/100/1000  | b/g/n\\ (300 Mbps)  | a/n/ac\\ (867 Mbps)  | Yes     | 802.3af  | No               | | Mediatek MT7621(AT or DAT) 880 MHz  | 128 MiB  | 16 MiB  | 2x 10/100/1000  | b/g/n\\ (300 Mbps)  | a/n/ac\\ (867 Mbps)  | Yes     | 802.3af  | No               |
- 
-**Power:** Device is powered only through __PoE 802.3af__ ("active PoE") and bundled with 220v __PoE injector__.  
- 
-:!: There is no information if device can be powered with "Passive PoE". 
- 
-:!: There is **No PoE Passthrough**: please note that device does not provide power to daisy-chained device. 
- 
-COMFAST CF-EW72 V2 is known to be produced in two variants (**not versions**): 
-  * COMFAST CF-EW72 V2 with MT7621AT and separate DDR RAM chip onboard. 
-  * COMFAST CF-EW72 V2 with MT7621DAT with integrated RAM and no DDR RAM soldered chip onboard. 
-PCBs for both variants are same. Firmware works for both. 
- 
-COMFAST CF-EW72 V2 known to be sold both in unpainted cardboard box and colorful glossy cardboard box. 
-I guess, but not guarantee that colorful box is for new variant equipped with MT7621DAT SoC and no RAM chip. 
- 
  
 ===== Installation ===== ===== Installation =====
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 ===== Hardware ===== ===== Hardware =====
 ==== Info ==== ==== Info ====
-^ Architecture     EXAMPLE MIPS                             +^ Architecture     | MIPS                                     
-^ Vendor           EXAMPLE Ralink                           +^ Vendor           | Ralink                                   
-^ Bootloader       EXAMPLE U-Boot                           +^ Bootloader       | U-Boot                                   
-^ System-On-Chip   EXAMPLE Ralink RT3052 - MIPS 24K V4.12   +^ System-On-Chip   MT7621                                   
-^ CPU/Speed        | EXAMPLE 451 MHz                          +^ CPU/Speed        | 880 MHz                                  
-^ Flash-Chip       EXAMPLE unkown                           +^ Flash-Chip       25L12833F                                
-^ Flash size       EXAMPLE 8 MiB                            +^ Flash size       16 MiB                                   
-^ RAM              | EXAMPLE 64 MiB                           +^ RAM              | 128 MiB                                  
-^ Wireless         EXAMPLE RT2860v2 2.4GHz 802.11bgn        +^ Wireless         MT7603 2.4GHz 802.11bgn\\ MT7663BEN 5GHz 802.11ac
-^ Ethernet         EXAMPLE 10/100 Mbit/s w/ vlan support    +^ Ethernet         2 x 10/100/1000 Mbit/s w/ vlan support   
-^ Switch           EXAMPLE Qualcomm Atheros QCA8337         +^ Switch           MT7530 (MT7621 built-in)                 
-^ USB              | EXAMPLE 1x 2.0                           +^ USB              | None                                     
-^ Serial           EXAMPLE [[#Serial|Yes]]                  +^ Serial           | [[#Serial|Yes]]                          
-^ JTAG             | EXAMPLE [[#JTAG|Not populated]]          |+^ JTAG             | Not populated                            | 
 + 
  
 +===== Power =====
 +
 +Device is powered only through __PoE 802.3af__ ("active PoE") and bundled with 220v __PoE injector__. 
 +
 +:!: There is no information if device can be powered with "Passive PoE".
 +
 +:!: There is **no PoE Passthrough**: please note that device does not provide power to daisy-chained device.
 +
 +===== MT7621AT or MT7621DAT =====
 +
 +For end user, there is no difference.
 +
 +COMFAST CF-EW72 V2 is known to be produced in two variants (**not versions**):
 +  * COMFAST CF-EW72 V2 with MT7621AT and separate DDR RAM chip onboard.
 +  * COMFAST CF-EW72 V2 with MT7621DAT with integrated RAM and no DDR RAM soldered chip onboard.
 +PCBs for both variants seem to be same. Firmware works for both.
 +
 +COMFAST CF-EW72 V2 known to be sold both in unpainted cardboard box and colorful glossy cardboard box.
 +I guess, but not guarantee that colorful box is for new variant equipped with MT7621DAT SoC and no RAM chip.
 +Seems that devices also have different factory labels.
  
 /*** if info available: uncomment and fill in /*** if info available: uncomment and fill in
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 /* Thanks, your wiki administration - Oct. 2015 */ /* Thanks, your wiki administration - Oct. 2015 */
  
-**Insert photo of front of the casing**+**Photo of casing**
  
-**Insert photo of back of the casing**+^ Front ^ Back ^ Opened Lid ^ 
 +| {{:media:comfast:cf-ew72-v2_casing_front.jpg?direct&200}} | {{:media:comfast:cf-ew72-v2_casing_back.jpg?direct&200}} | {{:media:comfast:cf-ew72-v2_casing_no_lid.jpg?direct&200}} |
  
-**Insert photo of backside label**+**Photo of backside label** 
 +^ Variant for MT7621AT                                      ^ Variant for MT7621<color #ed1c24>D</color>AT              ^ 
 +| {{ :media:comfast:cf-ew72-v2_label_v2.1.jpg?200&direct}}  | {{ :media:comfast:cf-ew72-v2_label_v2.2.jpg?200&direct}}  |
  
 **Photo of PCB** **Photo of PCB**
  
-{{:media:comfast:cf-ew72-v2_pcb-front.jpg?400|}} {{:media:comfast:cf-ew72-v2_pcb-back.jpg?300|}}+Click to enlarge 
 + 
 +^ Side A ^ Side B ^ 
 +{{:media:comfast:cf-ew72-v2_pcb-front.jpg?direct&200}} {{:media:comfast:cf-ew72-v2_pcb-back.jpg?direct&135}} 
 + 
  
 ==== Opening the case ==== ==== Opening the case ====
  
-<WRAP BOX> +=== Tools needed === 
-FIXME //Describe what needs to be done to open the device, e.g. remove rubber feet, adhesive labels, screws, ...// + 
-</WRAP>+  * Hot air gun (to gently remove factory sticker)  
 +  * Needle nose pilers 
 +  * PH0 screwdriver 
 +  * Сontainer for small items (zip bag)
  
 +=== Opening the case in steps ===
 +
 +^ Step ^ Text ^ Image ^
 +| 1 | Open the case and disconnect cables. | Click image\\ to enlarge |
 +| 2 | Use hot air to heat the factory label and peel it off.\\ If you wish, glue it to the back of the case, closer to the antennas. | {{:media:comfast:cf-ew72-v2_disassembly_10_remove_sticker.jpg?direct&100}} |
 +| 3 | Remove 2 screws hidden under the factory label. | {{:media:comfast:cf-ew72-v2_disassembly_20_remove_screws.jpg?direct&100}} |
 +| 4 | Unscrew antennas.\\ Remove big rubber rings.\\ Unscrew the nuts from the Wi-Fi antenna connectors using thin-nosed pliers.\\ Do not remove washer and o-ring hidden under washer yet. | {{:media:comfast:cf-ew72-v2_disassembly_30_remove_antennas_and_nuts.jpg?direct&100}} |
 +| 5 | Grasp the sides of the device and gently push the antenna connectors into the device.\\ Be careful with the center pin of the connector.\\ After the antenna connectors are completely inside the device, pull on the plastic insert with RJ45 connectors. | {{:media:comfast:cf-ew72-v2_disassembly_40_push_pcb_out.jpg?direct&100}} |
 +| 6 | Remove 2 washers and 4 o-rings in total.\\ There are 2 washers and 2 small o-rings on the outside of the case.\\ :!: There are two more small o-rings on Wi-Fi antenna connectors from the inside of the case.\\ They may be on antenna connectors or stick to casing from inside. Remove them.\\ | |
 +| 7 | Put into a zip bag:\\ ☑️ 1 factory label (if removed)\\ ☑️ 2 screws\\ ☑️ 2 big rubber rings\\ ☑️ 2 nuts\\ ☑️ 2 washers\\ ☑️ 4 small o-rings | |
 +| 8 | Put a zip bag inside an empty casing and close with a casing lid. | |
 +| 9 | Screw antennas to Wi-Fi connectors on PCB. | |
 ==== Serial ==== ==== Serial ====
 {{ :media:comfast:cf-ew72-v2_pcb-serial.jpg?200|}} {{ :media:comfast:cf-ew72-v2_pcb-serial.jpg?200|}}
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 How to connect to the Serial Port of this specific device:\\ How to connect to the Serial Port of this specific device:\\
-Device has factory-soldered 2.54mm pin header. 
- 
- 
- 
-It is recommended NOT connect VCC pin as device powers from PoE. 
- 
-GND pin is recommended to be connected. 
  
-In some situations device may not start when RX pin is connected - so, connect it right after you see output from device.+  * [[#Opening the case|Remove the case]].\\ 
 +  * Device has factory-soldered 4 x 2.54mm pin header (VCC, GND, TX, RX).\\ 
 +  * GND pin is recommended to be connected. \\ 
 +  * :!: It is recommended NOT connect VCC pin as device powers from PoE.\\ 
 +  * :!: It is recommended to connect serial adapter through active (with separate power) USB hub. Avoid connecting to usb port connected to computer motherboard. CF-EW72 V2 has 48V on PCB, and if 48V will somehow hit your USB, it may damage your PC, including CPU. 
 +  * In some situations device may not start when RX pin is connected - so, connect it right after you see output from device
 +  * Connected RX also may cause random 5GHz Wi-Fi chip problems.
  
 ^ Serial connection parameters\\ for COMFAST CF-EW72 V2 | 115200, 8N1, 3.3V | ^ Serial connection parameters\\ for COMFAST CF-EW72 V2 | 115200, 8N1, 3.3V |
  • Last modified: 2023/09/27 06:50
  • by filimonic