Posted 03 October 2010 - 02:05 AM
[quote name='yomike;64066]Well' date=' I achieved the dismantling.After foil removal, I had 15 screws to remove on my M002 version 4.All but the top plastic surround with the camera in the centre came out easily.The camera/wifi units had been glued and I managed to snap the plastic insert at the camera aperture getting this one off.1 further screw to remove the "motherboard".Observations:The camera is a usb device based on the Etrontech eSP268.I believe this uses the host usb port that can be accessed on the M001 with the rewiring of the 30 pin connector, which does not appear to be the case with the 002.The mic is located inboard and perpendicular to, the mic hole on the bottom edge and sits behind the reset switch which is accessible thru the small "M/R" hole. One mod I will consider is a hole in the face of the 002 above the mic to improve its performance as currently the mic performance is poor and low level. A more direct route for the sound to travel to the mic should help.The positioning of the WiFi unit is poor, so the poor WiFi performance is understandable. With it located up against the metal back of the screen and in close proximity to the camera PCB, the "shielding" effect on the antenna would be high. There was a noticable improvement in WiFi perfomance (as you would expect) when the WiFi module was released form the case ad in "free space". Promising!I looked at relocation of the Wifi module but there is no real "clear space" that would give a major improvement. I did extend the wiring and move it to the opposite side (from the camera) with the antenna outermost.I shall mod to an external antenna at a later stage. The wifi pcb looks like it takes a coax connector (U.FL or similar) nicely and the case should accommodate a RPSMA connector OK. A pigtail coax between the 2 should do the job. These are relatively easy to obtain.Then any standard RP-SMA 2.4GHz antenna can be used.'til next time....[/QUOTE'] Does anybody know the actual WiFi chip in the M002?Let me share what I have learned.On my M002 when using a terminal at root I found at /etc/Wireless/RT2870STA/, a configuration file RT2870STA.dat. According to the Ralink web site, this seems to be the configuration file for a RT2870 Wireless Lan Linux Driver that supports a "Ralink 802.11n Wireless LAN Card". In the Description section of the documentation for this driver, it says "This is a linux device driver for Ralink RT2870 USB ABGN WLAN Card." So I assume that this LAN chip can connect to a WiFi a/b/g/n AP. In an Ubuntu forum I have read that these Ralink chips like the b/g APs best. Indeed it connects just fine when I set my router to connect at 802.11 b/g only. When I connect to my WiFi Wireless Router in full mixed mode (802.11 b+g+n), I have seen speeds up to 60Mbps using the Android "WiFi Analyser" app, although the channel connected to and the speed varies from time to time. So I suspect that this card may in fact be a 802.11n chip.Eken's Official ROM for the M002 has thisconfiguration file almost identical to the one Ralink provides in its documentation. EKEN's configuration file has the SSID entered as "11n-AP", the CountryRegion as 5 (use Channel 1 through 14), the CountryRegionABand as 7 (use 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161, 165Channel), the TxPreamble as 0 (Preamble Long) , the WmmmCapable as 1 (Enable WMM)AuthMode as OPEN, and EncrypType as NONE. These settings seem to indicate that the driver is set by default to use an open network with no encryption. But I have found that when I connect to an Access Point in my home with WPA2PSK security and AES encryption, the M002 will connect just fine after I enter the passphrase into the M002. I find that I need to be less than about 10 feet (about 3 meters) from the wireless access point in order to connect.I have actually set all my router values in the RT2870STA.dat file and tried to connect to my router that way. Things worked out pretty well most of the time.Then after Eken released version 2.0, I found that connecting with an original configuration file worked just as well. So now I don't touch the configuration file.Two questions I have: (1) Do you know the actual WiFi chip that is in the M002? (What was printed on the WiFi chip?)(2) Do you know if this chip has one antennea or two antennas on it? Is it MIMO or just a single antenna. I wonder if from the outside of a chip if you can tell?Thanks for fielding these questions.