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by jimjulian
Sun Jul 28, 2019 9:04 pm
Forum: General discussion
Topic: wireless laptop-Pi network
Replies: 1
Views: 74

wireless laptop-Pi network

How do I setup a wifi network that does not require a router or modem? I'd like to have my laptop communicate with the Pi over SSH withput the need for the Pi to be connected to a router with a LAN cable, or any router at all.
Can I use the Pi wifi independently of any other network?
by jimjulian
Wed Jun 26, 2019 3:37 pm
Forum: General discussion
Topic: 3B+ as a Wireless Access Point
Replies: 22
Views: 8031

Re: 3B+ as a Wireless Access Point

I just finished adding the Acess Point from the page on this site and mentioned above. I can use the Pi to surf the web on my laptop. I haven't done that to any great degree since I have a TP-Link Talon 7200. Regarding the band usage also mentioned above; I can use the 2.4GHz band but the option for...
by jimjulian
Wed Jun 26, 2019 3:30 pm
Forum: General discussion
Topic: A portable wifi access point
Replies: 15
Views: 1105

Re: A portable wifi access point

Very Interesting.
I can travel with my cell phone, laptop or tablet, and connect to wifi anywhere there's a public access point.
Yet, I cannot do that with a RPi?
Sounds like a suggestion for future additional features.
by jimjulian
Wed Jun 26, 2019 3:22 pm
Forum: Troubleshooting
Topic: USB 2 & 3 compatibility in wifi AP
Replies: 2
Views: 419

Re: USB 2 & 3 compatibility in wifi AP

Hello, The point is: My RPi 3B+ wifi will not use 5GHz wifi even though the option exists in one of the configuration files. No, there's no setup error, country, etc., etc.. If the Pi can use the 2.4GHz band, then the Pi should be able to use the 5GHz band. I suggest there is an error in the specifi...
by jimjulian
Sat Jun 22, 2019 4:08 pm
Forum: Troubleshooting
Topic: USB 2 & 3 compatibility in wifi AP
Replies: 2
Views: 419

USB 2 & 3 compatibility in wifi AP

I just setup the RPi with a wifi access point. I chose hardware model g for compatibility with my 2.4GHz band. Both, the Ri and the router, are 5GHZ capable. I cannot get the 5GHz mode to work. I discovered the RPi has USB ports and my router has USB 3 ports. The SSID shows in 2.4GHz mode but not in...
by jimjulian
Sun Jun 24, 2018 10:25 pm
Forum: General discussion
Topic: multiple ADS1115s and Python
Replies: 6
Views: 669

Re: multiple ADS1115s and Python

You're contradicting your last post. This is moot. I have reason to suspect the unit is damaged. The chip, no doubt, has addressinig pins. The accessibility of these is dependent on the manufacturer's design of the breakout module. For example, the address of the PCF8591 commonly available on eBay i...
by jimjulian
Sun Jun 24, 2018 8:38 pm
Forum: General discussion
Topic: multiple ADS1115s and Python
Replies: 6
Views: 669

Re: multiple ADS1115s and Python

I've been trying that. I get the same errors I get when the ADS1115 is connected to a different address termination than the script specifies. I have a PCF8591 at 0x48 and ADS1115 at 0x49. The PCF8591 software runs without issue, but the Adafruit ADS1x15 software crashes. The method mentioned seems ...
by jimjulian
Sun Jun 24, 2018 4:46 pm
Forum: General discussion
Topic: multiple ADS1115s and Python
Replies: 6
Views: 669

multiple ADS1115s and Python

I have several ADS1115s I need to address from a python script. I've been using the Adafruit library which works for a single breakout board. I have not been able to determine if there is a method to select which ADS1115 I want to address. The Adafruit setup includes a "ADS1x15.py" script that sets ...
by jimjulian
Sat Jun 09, 2018 6:58 pm
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3544
Views: 114242

Re: STICKY: Introduce yourself!

Hello, My name is Jim Julian (one of many). I have a degree in Psychology and minored in Electronic Engineering. I've been 'playing' with computers for over thirty years. I learned digital cartography from the ESRI Arcviiew 3.2 GIS program suite and the Matlab mathematics laboratory in the mid-2000s...
by jimjulian
Wed Jun 06, 2018 6:42 pm
Forum: General discussion
Topic: RPi3B -> RPi3B+ SD plugin replacement?
Replies: 1
Views: 262

RPi3B -> RPi3B+ SD plugin replacement?

Hello, I just received a Raspberry Pi 3B+. Prior to this, I had been using a 3B. I have an SD card I have programmed for use with a solar panel array and linear actuator. I removed the SD card from the 3B and inserted the card into the 3B+. Everything seems to work normally, so far, except the wifi ...
by jimjulian
Tue May 22, 2018 1:02 am
Forum: Troubleshooting
Topic: induction problem gpio relay load
Replies: 38
Views: 7166

Re: induction problem gpio relay load

Hello,

I noticed the relay board you use does not have an optoisolator chip. That chip keeps the relay circuit separate from the driver circuit.
Buy a board that has the 4-pin opto chip. You're probably getting feedback from the relay circuit into the driver circuit.
by jimjulian
Wed Nov 16, 2016 3:43 pm
Forum: Beginners
Topic: i2c pin availability
Replies: 9
Views: 1651

Re: i2c pin availability

I'm using the RPi 3B as a solar array monitor/controller. This requires that I uses several i2c devices. The issue is only one device can be connected to the RPi. This is a hardware problem. Has anyone found a suitable work around, other than the use of solder and wires? Is there a mechanical faste...
by jimjulian
Sat Nov 12, 2016 6:15 pm
Forum: Beginners
Topic: i2c pin availability
Replies: 9
Views: 1651

i2c pin availability

Hello, I'm using the RPi 3B as a solar array monitor/controller. This requires that I uses several i2c devices. The issue is only one device can be connected to the RPi. This is a hardware problem. Has anyone found a suitable work around, other than the use of solder and wires? Is there a mechanical...
by jimjulian
Wed Oct 19, 2016 4:28 pm
Forum: Advanced users
Topic: truly wireless remote RPi
Replies: 24
Views: 3729

Re: truly wireless remote RPi

There is no rule which states that a WiFi hotspot must be connected to the Internet. Just turn the Pi into a hotspot itself asn SSH into it from your laptop. ghans Thanks ghans. That's what I had in mind but I wanted to see if anyone had done that and if there were any preparations required. Have y...
by jimjulian
Wed Oct 19, 2016 4:25 pm
Forum: Advanced users
Topic: truly wireless remote RPi
Replies: 24
Views: 3729

Re: truly wireless remote RPi

stderr wrote:
jimjulian wrote: I'm looking for a laptop-to-RPi commuinications approach.
Perhaps I should have mentioned, a cost effective solution is required.
Isn't wifi free?
You misread, if at all. Reread and then post.
by jimjulian
Mon Oct 17, 2016 5:30 pm
Forum: Advanced users
Topic: truly wireless remote RPi
Replies: 24
Views: 3729

Re: truly wireless remote RPi

Hello, The Hotspot modems require a cellular account and cost money. I could turn my iPhone into a hotspot as far as that goes. I sometimes do when my Internet provider is down or I'm away from home. I use my phone to connect my laptop to the web. I'm looking for a laptop-to-RPi commuinications appr...
by jimjulian
Fri Oct 14, 2016 4:31 pm
Forum: Advanced users
Topic: truly wireless remote RPi
Replies: 24
Views: 3729

Re: truly wireless remote RPi

Well, why not use a set of DLAN (PowerLAN) adapters? One unit is mounted next to your solar panel array, the other one is in your house. Under UK regulations, that is not allowed. There must be NO current using equipment (only the inverter) on the solar power circuit. I can't speak for regulations ...
by jimjulian
Fri Oct 14, 2016 4:27 pm
Forum: Advanced users
Topic: truly wireless remote RPi
Replies: 24
Views: 3729

Re: truly wireless remote RPi

Hello, Thank you for all of your responses. I'm just now reading them. I want to do some clarification. My RPi has on board wifi, since I'm using a 3B. I have the Pi set upp for wifi. I'm thinking that setting up as a wifi access point may solve the problem. After that I could use the Pi as a wifi h...
by jimjulian
Mon Sep 26, 2016 7:57 pm
Forum: Advanced users
Topic: truly wireless remote RPi
Replies: 24
Views: 3729

Re: truly wireless remote RPi

Thank you. I can do all that. What I need is to communicate with the RPi with nothing but a power cable attached to the RPi.
by jimjulian
Mon Sep 26, 2016 3:08 pm
Forum: Advanced users
Topic: truly wireless remote RPi
Replies: 24
Views: 3729

truly wireless remote RPi

Hello, I have a RPi 3B and an using the RPi as a controller and monitor for a solar panel array. Currently, the only methods I have to use the RPi involve a wired connection to my laptop or to a router. I'm searching for a way to communicate with the RPi with my laptop and with the RPi mounted on th...
by jimjulian
Sun Sep 18, 2016 8:14 pm
Forum: Advanced users
Topic: file i/o in www/html with a php browser script
Replies: 1
Views: 442

file i/o in www/html with a php browser script

Hello, I'm retrieving data from a device uart using modbus communications protocol over an RS485 line. I have a series of scripts that do that. One creates a text file and writes data to the file, then closes. The script is in an infinite loop and will repeat the process indefinately, creating only ...
by jimjulian
Sun Sep 18, 2016 5:48 pm
Forum: Advanced users
Topic: Linux kernel source installer
Replies: 8
Views: 11088

Re: Linux kernel source installer

When you run the program, you get the following message :

ERROR:
gcc version check: mismatch between gcc (4.9.2) and /proc/version (4.7.1)
Skip this check with --skip-gcc

I would suggest adding the mentioned flag to bypass the check and then try.

Hope this helps.
by jimjulian
Fri Aug 26, 2016 4:09 pm
Forum: Raspbian
Topic: Raspbian Jessie (64bit) for RPi3?
Replies: 145
Views: 134025

Re: Raspbian Jessie (64bit) for RPi3?

Hello,

This begs the question:
Can I run 64-bit programs or install packages like libnih-dbus1_1.0.3-4.3_arm64.deb from the Debian site?

Thank you,
Jim Julian
by jimjulian
Mon Aug 01, 2016 4:37 pm
Forum: Windows 10 for IoT
Topic: speech control from Windows for Raspberry Pi
Replies: 0
Views: 521

speech control from Windows for Raspberry Pi

Hello,
Is there a way for Raspberry Pi's Win IoT software to communicate with a laptop running Windows 10 ?
I'd like to use Dragon speech recognition software for Windows to control relays and ADC boards attached to the Raspberry Pi.

Thank you,
Jim Jluian
by jimjulian
Mon Jul 25, 2016 3:26 pm
Forum: Python
Topic: i2c_tools documentation
Replies: 7
Views: 5152

Re: i2c_tools documentation

Hello, Perhaps more of a rejoinder rather than a reply; the only command from i2ctools that I've ever seen used is the, almost, ubiquitous "i2cdetect -y 1". I've often wondered if there was a pdf or website with more on the capabilities of the tool. Is i2ctools a "one trick pony"? Thank you, Jim J.

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