rawe- get cheap "CP2102 breakout board" for sub-2eur
- cut the 5V power trace on the bottom and solder the 3V3 jumper link
- crack open the enclosure of OBD2 Wifi toy
- remove wifi module from main pcb
- solder 2.5mm to 2mm adapter header from junk bin parts (or just use some wires)
- connect the two: GND to GND, POWER to POWER(3V3!!!) TX to TX and RX to RX (yes, they swapped the signal names on CP2102 breakout board silk screen)
- connect CP2102 breakout board to usb port and fire up putty
- connect with 38400 baud
- send the following ...
+++ cmd> setet 4 Ok cmd> setwp ***************** Ok cmd> setssid Bordnetz Ok cmd> wificonfig SSID : Bordnetz Network Type: AP(2) Encrypt Type: WPA2-AES(4) PassPhrase : ***************** Ap's channel: 1 Dhcp Client : enable Ok cmd> saveconfig Saving Configuration to FLASH Ok cmd> reboot device will reboot... Ok cmd>
- UNPLUG and REPLUG the usb dongle so wifi module does HARD RESET
- restart your laptop or at least the wireless drivers/interface to forget "known ssid" list (else it tries to connect WITHOUT encryption, which will fail
- connect to wireless network, input passphrase, done
and *tadaa*
Cell 06 - Address: 00:0E:C6:00:3B:1B Channel:1 Frequency:2.412 GHz (Channel 1) Quality=48/70 Signal level=-62 dBm Encryption key:on ESSID:"Bordnetz" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s 18 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s Mode:Master Extra:tsf=00000000366ff4f2 Extra: Last beacon: 344ms ago IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : CCMP Pairwise Ciphers (1) : CCMP Authentication Suites (1) : PSK
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how reset login user password on
for OBD host: 192.168.0.10 ?
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Thanks for all the discovery and hacking. I am reading the instructions on how to secure the wifi and for the life of me I can't figure out what you mean by cutting the 5v trace. It looks like the CP2012 already has a 3.3V power out? Do I have to use a jumper and sever a trace to get 3.3 out of this board?
Also, my wifi module says Nufront on it but looks almost identical. Is it based on the same AXIX chipset?
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is it possible to make the elm scan for an wifi network, if found connect (credentials saved in code), if not switch to ap mode
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For this, you may want to replace the integrated wifi module with an ESP8266 and script this via LUA.
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Hey. Can you please provide an exact pin connection for accessing the wifi module with an Uart converter?
Given this one:
https://cdn.hackaday.io/images/4168131408466927600.jpg
is it in order 2,3,4,5 for GND,TX,RX,POWER?
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You are right. See https://hackaday.io/project/2523/log/7428 for a pinout.
2 GND. 3 TX. 4 RX. 5 3.3V (not 5!). 38400 baud.
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ok, I got this one
http://www.produktinfo.conrad.com/datenblaetter/175000-199999/197326-an-01-de-MINI_USB_TO_UART_CONVERTER_de_en_fr_nl.pdf
but I can't see how to get 3.3V out of it...
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this board provides 3.3V singal levels but no 3.3V supply voltage. you could use something like LD1117V33 (from Conrad) plus two decoupling caps (100nF / 1uF), or a cp2012 based adapter (cp2012 contains 5V to 3.3V regulator, adapter boards are 1-3 eur at ebay, incl. shipping).
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