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by mccpi
Sun Oct 28, 2018 10:15 am
Forum: Beginners
Topic: Saveing power for currently not needed features
Replies: 3
Views: 424

Re: Saveing power for currently not needed features

Hi bensimmo,

thanks for your reply!

"Misread" sounds a little too "analog" to me...it's not a shortwave signal
bcmstat tries to read... ;)

But: Don't know...how could I verify or falsificate this?

Cheers!
Meino
by mccpi
Sun Oct 28, 2018 8:24 am
Forum: Beginners
Topic: Saveing power for currently not needed features
Replies: 3
Views: 424

Saveing power for currently not needed features

Hi, To save the power of my LiPo cell I am hunting for feature, I don't need in the moment and switch them off. The connection to my Raspi 0 W currently is ssh over wifi (terminal only). I used this script bcmstat.sh (https://github.com/MilhouseVH/bcmstat) to monitor my raspi 0 w. The following happ...
by mccpi
Tue Oct 16, 2018 6:40 pm
Forum: Beginners
Topic: UPS-Lite: MAX17040 nuts?
Replies: 0
Views: 305

UPS-Lite: MAX17040 nuts?

Hi, I am using one of these: https://www.aliexpress.com/item/1PCS-Raspberry-Pi-Zero-UPS-power-board-integrated-serial-port-power-detection/32893660585.html which -- beside other things -- has a MAX17040 (datasheet here: https://datasheets.maximintegrated.com/en/ds/MAX17040-MAX17041.pdf) on board. Th...
by mccpi
Tue Oct 09, 2018 3:24 am
Forum: Beginners
Topic: Raspi Zero W & UPS-Lite
Replies: 1
Views: 631

Raspi Zero W & UPS-Lite

Hi, I am running my Raspberry Pi Zero W with a UPS-Lite (https://www.aliexpress.com/item/1PCS-Raspberry-Pi-Zero-UPS-power-board-integrated-serial-port-power-detection/32893660585.html). I want to check the functionality of the MAX17040 fuel gauge chip use by that board. As far as I can tell the volt...
by mccpi
Mon Oct 08, 2018 5:02 pm
Forum: Beginners
Topic: How to I2C in C ?
Replies: 4
Views: 583

Re: How to I2C in C ?

Hi danjperron,

that's GREAT! :)
Thank you :) :)

Cheers!
Meino
by mccpi
Sun Oct 07, 2018 3:59 pm
Forum: Beginners
Topic: How to I2C in C ?
Replies: 4
Views: 583

Re: How to I2C in C ?

Hi, Thanks a lot for this great informations, buja! That "cake" :) tastes good! I have a datasheet for the chip in question...its a Maxim MAX17040. So the device thingy should not be the problem.... :) The step-up converter is a FitiPower FP6717 by the way. I can't decipher the charger IC ... there ...
by mccpi
Sun Oct 07, 2018 2:10 pm
Forum: Beginners
Topic: How to I2C in C ?
Replies: 4
Views: 583

How to I2C in C ?

Hi, I bought one of these: https://www.aliexpress.com/item/1PCS-Raspberry-Pi-Zero-UPS-power-board-integrated-serial-port-power-detection/32893660585.html?spm=a2g0s.9042311.0.0.3da24c4dMlUKfL which have an I2C enabled fuel gauge. A script (python) is included to monitor the charge level and the curre...
by mccpi
Sat Oct 06, 2018 9:01 am
Forum: Beginners
Topic: Raspi Pi Zero W: Wlan "like Android"...
Replies: 2
Views: 121

Re: Raspi Pi Zero W: Wlan "like Android"...

Hi,

thank you very much!
It had not expected, that this would be THAT simple...and I am very happy it is! :)

Cheers!
Meino
by mccpi
Sat Oct 06, 2018 6:54 am
Forum: Beginners
Topic: Raspi Pi Zero W: Wlan "like Android"...
Replies: 2
Views: 121

Raspi Pi Zero W: Wlan "like Android"...

Hi, when using my Android tablet with activated WLAN, it logs into each Hotspot it knows its login data dependant on which is hotspot is currently available. I want to replicate this behaviour with my Raspi Pi Zero W. Based on the hotspots I am normally exposed to I dont need a connection decision b...
by mccpi
Tue Aug 21, 2018 3:34 am
Forum: Beginners
Topic: Confused by LiPo CutOff voltage and the DW01 protection IC
Replies: 12
Views: 1670

Re: Confused by LiPo CutOff voltage and the DW01 protection IC

Hi,

the curve is of a Nokia BL5C, which is a Li-Ion accumulator...not a LiPolymere.

Cheers
mcc
by mccpi
Sat Aug 18, 2018 1:33 pm
Forum: Beginners
Topic: Confused by LiPo CutOff voltage and the DW01 protection IC
Replies: 12
Views: 1670

Re: Confused by LiPo CutOff voltage and the DW01 protection IC

If safety is a imported to you, why are you buying a battery that doesn't provide you all the information. And (possible) from on unknown brand.
Unfortunately, I can't answer that question. Because I'm not a expert on this.
...because it is my very first LiPo I bought...
by mccpi
Sat Aug 18, 2018 3:40 am
Forum: Beginners
Topic: Confused by LiPo CutOff voltage and the DW01 protection IC
Replies: 12
Views: 1670

Re: Confused by LiPo CutOff voltage and the DW01 protection IC

Hi, currently I use a Raspberry Pi Zero W (connected via Wifi, so Wifi is on) as load. What confuses me is, that there are so many different values are given for the cut off voltage of LiPo cells, which all works with the same kind of chemistry. A company selling LiPo cells is interested in producin...
by mccpi
Fri Aug 17, 2018 6:52 pm
Forum: Beginners
Topic: Confused by LiPo CutOff voltage and the DW01 protection IC
Replies: 12
Views: 1670

Re: Confused by LiPo CutOff voltage and the DW01 protection IC

Hi, I am unsure of copyright issues this may have or not...so I will put links to the informations instead: The WeMOS battery shield: https://wiki.wemos.cc/products:d1_mini_shields:battery_shield (This has no protection circuitry at all.) A video about this shield (review/testing/data) https://www.y...
by mccpi
Fri Aug 17, 2018 6:04 pm
Forum: Beginners
Topic: Confused by LiPo CutOff voltage and the DW01 protection IC
Replies: 12
Views: 1670

Confused by LiPo CutOff voltage and the DW01 protection IC

Hi, I am a little confused. The WeMOS battery shield provides a efficient boost converter and and a charger circuit but with no overdischarge protection. My 1000mAh LiPo cell (such a silvery pouche-thingy) has a DW01 based protection board. According to the datasheet of the DW01, it disconnects the ...
by mccpi
Sun Jul 22, 2018 3:23 pm
Forum: Beginners
Topic: "Stuttering" Raspi Zero W
Replies: 4
Views: 331

Re: "Stuttering" Raspi Zero W

Hi, ejolson, thank you for your suggestions for fixing the problem! in the meanwhile my RPZW behaves quite normal again. The distance between the router and my RPZW is (and was) about 40cm. The routers transmitter is strong enough to reach the next room through a wall. Currently I tend to think (car...
by mccpi
Sat Jul 21, 2018 4:35 pm
Forum: Beginners
Topic: "Stuttering" Raspi Zero W
Replies: 4
Views: 331

"Stuttering" Raspi Zero W

Hi, I got mysterious problem here with my Raspberry Pi Zero W, which is configured as Wifi Client and logs into my WLAN when powered up. I can connect to the PiZW via ssh and enter my password to get a commandline............ prompt. It behavr quite normal for a few commands and then stucks again in...
by mccpi
Sun Jul 01, 2018 4:45 pm
Forum: Beginners
Topic: SIMH: how can I get simh 3.9 / 4.0 ?
Replies: 2
Views: 290

SIMH: how can I get simh 3.9 / 4.0 ?

Hi, to emulate old Unix version (with the original loging of dmr! YEAH!) I am using simh. The version of simh, which comes with Stretch is simh 3.8-1. With this version some instruction, how to boot such an old UNIX tape failed with an exception. The boot-tutorial uses simh 3.9. Current is simh 4.0....
by mccpi
Sun Jul 01, 2018 3:19 pm
Forum: Beginners
Topic: To use an OTG cable ... or not?
Replies: 1
Views: 168

To use an OTG cable ... or not?

Hi,

when setting up the RP0W as an USB-OTG device which does Serial-over-USB ... and I want to use
this RP0W to attach it to my Android tablet...do I need to use an OTG-cable or not or will I fry one or
both my devices anyway?

Thanks for any help in advance!
Cheers
Meino
by mccpi
Thu Jun 28, 2018 5:26 pm
Forum: Beginners
Topic: Role of the dhcpd on a Raspberry Pi Zero W
Replies: 3
Views: 251

Re: Role of the dhcpd on a Raspberry Pi Zero W

Hi all,

thank you very much for your help! This forum is awesome!

I now have two working ethernet interfaces from and to my RBZW!
Both can be used for ssh!
YEAH! :)

Cheers
Meino
by mccpi
Thu Jun 28, 2018 2:50 am
Forum: Beginners
Topic: Role of the dhcpd on a Raspberry Pi Zero W
Replies: 3
Views: 251

Role of the dhcpd on a Raspberry Pi Zero W

Hi, to make my RP0W accessible (ssh) via from my Linux PC as via my tablet, I have configured it to provide an ethernet-over-usb interface (work, can log in, but....see below). Currently it also provide an other ethernet-ish interface via WLAN as a client. Later I will replace this interface with an...
by mccpi
Wed Jun 27, 2018 3:16 am
Forum: Beginners
Topic: Static IP for Ethernet-over-USB
Replies: 1
Views: 212

Re: Static IP for Ethernet-over-USB

Ok, I found the bug myself....it sitting in front of my monitor... ;)

(I missspelled the name of the config file)

Cheers
Meino
by mccpi
Wed Jun 27, 2018 2:47 am
Forum: Beginners
Topic: Static IP for Ethernet-over-USB
Replies: 1
Views: 212

Static IP for Ethernet-over-USB

Hi, I am .... confused. My RB0W runs on the current version of Raspberian Stretch lite. To get rid of the problems which may arise from setting up my RP0W as Wifi Access Point and Wifi client at the same time, I now try to set it up as USB gadget device, which provides Ethernet-Over-USB as replaceme...
by mccpi
Mon Jun 25, 2018 3:00 am
Forum: Beginners
Topic: Wifi: Client and Access Point simultanously
Replies: 2
Views: 328

Wifi: Client and Access Point simultanously

Hi, in the meanwhile my RB0W is now running as client and connects to my Fritz!Box automagically. By reading several HowTos on the internet how to add the capability to my RB0W to act as Acess Point also, I failed several times and it throws me back to UART-connections. Unfortunately not every tutor...
by mccpi
Sat Jun 23, 2018 1:19 pm
Forum: Beginners
Topic: Auto logout when using ssh into RP0W ?
Replies: 4
Views: 338

Re: Auto logout when using ssh into RP0W ?

Hi, got the next problem... I saved ~/.ssh/config on the client side (RP0W) with this content: Host * TcpKeepAlive yes ServerAliveInterval 3600 ServerAliveCountMax 3600 Now its timed out very much later. But it is stuck...a reconnect via ssh isn't possible the whole thing is "off the net": Host unre...
by mccpi
Sat Jun 23, 2018 10:07 am
Forum: Beginners
Topic: Auto logout when using ssh into RP0W ?
Replies: 4
Views: 338

Re: Auto logout when using ssh into RP0W ?

Hi tpyo kingg,

this forum is AWESOME! :)

Thank you very much for your help!

I am very happy, that it is just a idle timeout...I feared that either one tries to break into my WiFi or my RP0W is broken
(or even worse: My Fritz!Boxs WiFi is broken)...

Have a nice weekend!
Cheers
Meino

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