On Saturday 22 February 2014 10:11:08 Michel Stempin wrote: > > You're right about using the word "guess". It IS guesswork when it comes > > to these manufacturers. However, I will have to tentatively disagree it's > > the same module. I have sort of identified 3 different modules: > > > > 1. GS OOlite V1.0 - this one is the one I got and it only got connectors on > > 2 sides - 1 wan 1 lan wired up - all gpio's exposed > > 2. GS Oolite V1.14 (I think) - this one may or may not be identical to the > > one you mention - connectors on 3 sides and built-in pcb antenna > > 3. GS Oolite V2 - looks like the previous one but got all 5 ethernet ports > > wired up and no built-in pcb antenna
I made a typo there sorry - the last one was identified as Oolite V1.2 not V2. > It looks like they provide another board advertised as "Oolite S1.0" or > "Oolite V1.2" > <http://3cmade.en.alibaba.com/productgrouplist-218161923/Oolite_S1_0.html>, > with 5x Ethernet ports and almost no GPIO. Yes, that's the last one in my above list. > Yours is yet another version, with only 2x Ethernet ports but almost full > GPIOs, it may well be an "Oolite V2.0" but they forgot (or didn't know how) > to change the firmware version, so you may not have been spoiled ;) I am not complaining - the device seems to work fine and it is dirt cheap. > >> The main drawback of these modules is that they are not individually RF > >> calibrated on the production line, resulting on poor/non conform WiFi > >> performance. You can figure this out by reading the RF ART calibration > >> partition on 2 random units: they will be the same, byte for byte :( > > That is quite interesting information. I'll check my modules. > Please let me know about the result, as I tested on mines and have it tested > with another unrelated person from the forum and got the exact same ART > partitions. THis may be different for your newer board, but you'd better > check! For now I did a simple md5sum of the art partition on the two devices I have and they are NOT identical! I have however no idea how to decode the information contained in that partition, so whether that means they are not calibrated I do not know. I am also not an RF engineer but I would suspect that the manufacturer could get away with identical calibration on a device such as this. The differences between the boards are probably not all that big. By the way - don't they actually store the MAC address on that partition? If that is the case they ought to be different. //Lars... _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
