The WORKBENCH part 3

Wrote some software for that one almost 20 years ago :slight_smile:

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lol… I think I bought it in '86 on the Airport in London.
It just came out and I had to have it… bought a 9v battery this morning just to see … and


if the time stood still for over 30 years :sunglasses: :heart_eyes:


LOL I could so relate to that.

The cool thing about that those days is that i used standard batteries etc. One thing you can’t say from the modern stuff.

Thinking about it, I believe I still have my Palm III laying around in a drawer, i used 2 AAA batteries to operate for a month. Want to bet when i put 2 of those in it, it will play the boot jingle and asks me to enter the date time LOL.

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building dev setup with a Mini Ultra LoRaWAN module / GPS / RTC / oled / keypad / eeprom

never works the first time… I’m bughunting :stuck_out_tongue_winking_eye:


Towards the end of the ‘Part 2’ version of this thread in the context of a new RPi0W being delivered I mentioned:

…What amazes me is it was cheaper to buy this RPi0W from US vendor - even though built in a factory in UK (S.Wales) and have it shipped back than to buy from a UK/EU channel - even allowing for shipping (similar charges from UK stock vs across Atlantic)…not good for environment, but better for pocket!

Also frustrating that vendors only seem to sell 1 off’s of these versions (unless buying the ones with headers added - more expensive and dont work for the GW builds! :frowning: ) - as I prefer to build & configure gateways in small batches - 3 to 5/6 at a time for speed, efficiency and economy. Shipping costs spread over more boards would be even better value!

Well it gets worse! :frowning:

I had picked up several RPi0W’s since intro from various locations and have used for GW builds. The latest delivery being yet another example. I thought I could only buy 1 at a time…place a new order this week and this is what I got back from sellers Customer Service contact:-

Hello Jeff,

Due to the restrictions set in place by the Pi Foundation we are only allowed to sell one Raspberry Pi Zero W (XXXXXXXXX) per customer. This unfortunately means that after we ship one we are not able to ship any more to the same customer.

It looks like you placed an Order #53XXXXX for the Pi Zero back on December XXth so we are not able to fulfill any additional orders for the Pi Zero.


If that’s the case how can I build any more let alone get to decent volumes?!

Been there… Needed 12 for a gateway building workshop. Luckily I was able to use the (more expensive) RPi zero-WH which is available in volume without restrictions.

Problem with that is headers vs pins & wrong side for use with @charles RAK831 i/f bd! :frowning: …maybe he can spin for the WH version? :wink: …was just sourcing bits for another 3-5 build end Jan/Beg Feb.

#metoo in Dutch shops - (all of them) its the same restriction, 1 per customer

I tried to order 2 days later from the same shop and was refused, then I ordered from 3 different shops :wink:


Might prove useful for multi sensor/rate of change temp sensor as part of a LoRaWAN monitor or alarming system?

maybe… :sunglasses: interesting thought, bet there are no arduino libs yet

2%20TFT%20Circular%20multicolour%20LCD%20Display%201 2%20TFT%20Circular%20multicolour%20LCD%20Display%202

that’s new : DFRobot low-power 2.2 TFT Circular multicolour LCD Display

I think the libraries are already available:

yes tnx. but I was responding to Jeff with his I2C temp sensing chips :wink:

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@Jeff-UK I have only tried this with single row headers and of course this assumes that your PiZero WH has straight pins and not 90degree…

If you hold the plastic part on a row of male header pins you can push the individual pins in and out of the plastic. They are just a friction fit. It is possible to slide the plastic separator off pins that are already installed on a PCB if you work it carefully up from the PCB. You can slide the plastic separator onto the pins on the opposite side of the board.

Depending on the application there may be enough pin sticking through the board once the plastic has been moved but in the worst case some heat on the pins one by one will allow you to move them through both the PCB and the plastic guide. Probably a good idea to flow some fresh solder on each pin after you have them all set the right length in the PCB to avoid dry joints as you may have drawn solder with the pin.

HTH, Garry

…fixed that for you there @BoRRoZ


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If I get desperate I might try that - have done something similar on smaller - 10-16 pin 0.1 pitch headers in the past - heating the plastic with a heatgun makes it easier to pull the plastic off then as you say reflow each pin and push through as far as practical and level/even up :slight_smile: . One issue is the solder that comes with the pins then either making pin too thick for new socket use or causing a potential corrosion/poor joint problem longer term…ok on quick turn re-usable projects & development recycling but not what I want for a long term, possibly hard to reach GW deployments :wink:



wasted a few hours ‘bughunting’ … I just forgot to use pull up resistors on the I2C bus :roll_eyes:

short explanation idea/experiment :

this (allready joined @home) mobile device transmits, after the push of a button, 3 single bytes packets (with some interval time)
1 on SF 7
1 on SF 9
1 on SF 12

@home I will have a dedicated RPI with an application that responds when received one (or more) of these packets.
The device responds by sending then it’s location from GPS (when there’s a sat lock)

The application receives the coordinates and calculates the distance(s) between the gateway(s) that received the signal and the device location.
The application (mini server) sends the calculated distance / RSSI / SNR back to the device where its displayed.

so basically its a handheld mapper :sunglasses: without the need of a phone when it works I can think of ‘automatic / continue modes’ nice thing is that the data is immediate available @home

with some fantasy , a faster processor/more memory and a programmable attenuator/compass you can use it to find gateways ? :smirk:


Another load of goodies arrived (very early c/w expected dely date!) today thanks to our friends @rakwireless & @kenyu


2 (more) x RAK831 Concentrator Modules, 1 (more) x Pilot GW & most importantly 4 x WiseTrio 5205 Tracker modules ready for test/eval.

The latter very nicely packed in quality plastic boxes, though I do wonder if the old (recycled?) cardboard boxes not cheaper & better for the environment :thinking: …still the boxes will be kept and used for holding projects & components once tests finished :slight_smile:


With the recent buy of (yet another) RPi0W I can now finish another GW based on @Charles bd and another RPi2 based build using RAK i/f bd…add those to the new Pilot and that should be another 3 GW’s added & registered on TTN in next week of so once i have time to set up. :smile:


Problem - which to play with first - GW’s or the Trio5205’s?! :thinking:


Constructing LoRaWAN nodes using TTN Uno and a cusom shield for IoT Class. 7 of 9 ready. 13 to go!



3.2" - NX4024T032 - 400*240 - 4 mb flash

4.3" - NX4827T043 - 480*272 - 16 mb flash

decided to use the bigger (4.3" ) touchscreen.
pro : more info on one page / easier to navigate
con: power consumption / size

this is the gui idea