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by garylee123
Tue Sep 24, 2019 6:52 am
Forum: Python
Topic: RS485 CAN HAT ----CAN BUS MODULE PYTHON-CAN
Replies: 0
Views: 69

RS485 CAN HAT ----CAN BUS MODULE PYTHON-CAN

Hi guys These days I am working on MCP2515 can bus module and lucky this module can communicate with the PC by using a USB adapter. Then I wrote the python code to send the messages to PC, it also worked but I found something wired which may beyond my knowledge. The python code I wrote: for k in ran...
by garylee123
Fri Sep 06, 2019 3:21 am
Forum: Compute Module
Topic: CM3+ Could not communicate with wpa_supplicant
Replies: 5
Views: 553

Re: CM3+ Could not communicate with wpa_supplicant

Bus 001 Device 006: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0bda Realtek Semiconducto...
by garylee123
Thu Sep 05, 2019 9:42 am
Forum: Compute Module
Topic: CM3+ Could not communicate with wpa_supplicant
Replies: 5
Views: 553

Re: CM3+ Could not communicate with wpa_supplicant

WI-FI adapter: MERCURY MW150US
by garylee123
Thu Sep 05, 2019 9:18 am
Forum: Compute Module
Topic: CM3+ Could not communicate with wpa_supplicant
Replies: 5
Views: 553

CM3+ Could not communicate with wpa_supplicant

Hi all I flashed the CM3+ 16G module today, the image version is 2019-06-20-raspbian-buster-full.img. When I finish flashing, and powerde up, it seems like well. However, when I tried to config wifi by using cmd "sudo raspi-config", and then enable "wi-fi", a sentence came out "Cound not communicate...
by garylee123
Tue Aug 20, 2019 3:53 am
Forum: Python
Topic: Using I2C interface with python with High speed mode
Replies: 3
Views: 1149

Re: Using I2C interface with python with High speed mode

I have not tried this, but pigpio has a bit-banging mode. Check out: http://abyz.me.uk/rpi/pigpio/python.html#bb_i2c_open http://abyz.me.uk/rpi/pigpio/python.html#bb_i2c_close http://abyz.me.uk/rpi/pigpio/python.html#bb_i2c_zip I have checked the websites you posted, but I am considering are there ...
by garylee123
Mon Aug 19, 2019 3:33 am
Forum: Python
Topic: Using I2C interface with python with High speed mode
Replies: 3
Views: 1149

Using I2C interface with python with High speed mode

Hi Guys I am now working on an ADC module (ADS7823) with raspberry pi 3B+. The coding is in python3 and I imported the SMBUS. Till now it works very well. There are three kinds of working mode for ADS7823 which are Standard mode(100Khz),Fast mode(400Khz) and High speed mode(3.4MHz).The speed here is...
by garylee123
Fri Aug 09, 2019 7:20 am
Forum: Troubleshooting
Topic: how to control IO output while turning on rasp pi
Replies: 1
Views: 53

how to control IO output while turning on rasp pi

Hi guys I am working on a project which based on raspberry pi 3B+. In this project, I used an I/O port which is GPIO5 (BCM). I use this port to turn on and off a module. I set this port as output in code and it did well but now I have to set this port to low volatge(False) while turning on the raspb...
by garylee123
Fri Aug 09, 2019 6:32 am
Forum: Beginners
Topic: Raspberry pi 3b+ Working mode
Replies: 1
Views: 246

Raspberry pi 3b+ Working mode

Hi guys I am new to the raspberry pi 3b+ and this is my first time to use it. Now I am considering that how many working modes does raspberry have? The working mode here which means reduce the frequency or light to reduce the power consumption. I used to use Nvidia Jetson TX2, and it has five kinds ...

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