Trying out the rtl8710 chip.
Describing the attepmts to communicate with the chip using the AT commands.
I was fallowing the guide provided by cnxsoft you can find at:
RTL8710_Getting_Started_Guide
Found datasheets and commands for the chip on the github:
eggman docs
RTL00_datasheet_V1.0
RTL01_datasheet_V1.1
RTL8710_DEBUG_operation_manual
At first the chip would enter into loop with the following message:
[B&T_IOT_RTL8710] ######### NOT B&T FIREWARM CHECK FAILED!!! ##############
"Firewarm" is no mistake, it does say "FIREWARM" instead of Firmware.
If I type a lot it would say:
After a while trying to make the chip work I've accidentally shortened the CHIP_EN pin.
The chip rebooted and I got a different result:
No commands are accepted, neither the wifi is initialized.
I was suggested to do the next:
First thing I did was to measure the amount of current that ftdi232 is able to deliver.
The result was about 0.38 Amps.
Then I've added a capacitor
Also pulled up the chip_en pin.
Also I've connected an ammeter to the vcc pin to see what is the current consuption.
Results are the following:
Module won't boot, it's in the "shutdown chip" mode.
Current withdrawal:
According to the datasheet 15mAmps corresponds to the Modem-Sleep mode.
Chips starts to boot, but stops with the same message as before : "Starting wifi ..."
Message:
=========================================================
ROM Version: 0.3
Build ToolChain Version: gcc version 4.8.3 (Realtek ASDK-4.8.3p1 Build 2003)
=========================================================
Check boot type form eFuse
SPI Initial
Image1 length: 0x3704, Image Addr: 0x10000bc8
Image1 Validate OK, Going jump to Image1
===== Enter Image 1 ====
load NEW fw 0
Flash Image2:Addr 0xb000, Len 321412, Load to SRAM 0x10006000
No Image3
Img2 Sign: RTKWin, InfaStart @ 0x10006079
===== Enter Image 2 ====
[B&T_IOT_RTL8710] ###################### #################### ########################
[B&T_IOT_RTL8710] # # # # # #
[B&T_IOT_RTL8710] # ################ # # # ################## ######### #########
[B&T_IOT_RTL8710] # # # # # # # #
[B&T_IOT_RTL8710] # # # # # # # #
[B&T_IOT_RTL8710] # # # # # # # #
[B&T_IOT_RTL8710] # # # # # # # #
[B&T_IOT_RTL8710] # ################ # # # # #
[B&T_IOT_RTL8710] # # # # # #
[B&T_IOT_RTL8710] # ################## # ####### # # #
[B&T_IOT_RTL8710] # # # # # # # #
[B&T_IOT_RTL8710] # # # # # ####### # #### # #
[B&T_IOT_RTL8710] # # # # # # # # # # # #
[B&T_IOT_RTL8710] # # # # # # # # # # # #
[B&T_IOT_RTL8710] # # # # # # # # # # # #
[B&T_IOT_RTL8710] # ################ # # ########## ##### # # #
[B&T_IOT_RTL8710] # # # # # #
[B&T_IOT_RTL8710] ####################### ##################### ########
[B&T_IOT_RTL8710] ######### Company website&Support&Forum link: http://www.iot-tech-now.com/ ##############
[B&T_IOT_RTL8710] ######### CHECK FIREWARM SUCCESS !!! ##############
[B&T_IOT_RTL8710]#
Initializing WIFI ...
A strange thing happens with the current. The chip consumes 15 or 25 mAmps:
According to the datasheed there is one mode that consumes 30mAmps, but it's not translated:
Well thats it, removed the protective plate, burnt the indicator led.
Booting process still the same
