What about software I2C on 2 other free I/O? not the best but could save buying another hardware 
probably not Charles… clockspeeds of 100 / 400 khz ? really need dedicated hardware… especially when your node is running LMIC
I will try first with the ordered module and if really neccessary there must come a pcb with 2 x ds3231 and one TCA9548A and off course an FRAM … so you have 4 controllable alarm interrupts over i2c and a nice alarm / sensor settings table
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Google photo’s any good to you…?
maybe… @ the moment they are on a local nas and in the cloud, didn’t researched a lot last weeks but yeah, maybe google is an idea too tnx
new e paper portable test rig next to the ‘old’ one 
these e paper displays are a perfect match for let’s say a temperature node.
they don’t use any energy so the last measurement transmitted stays on the screen after you disconnect the power (gpio off) and the processor goes to sleep.
the display flashing during write (always full screen and can take up 1 to 5 sec!) is no problem when refreshing a few times per hour .
problems arise when you try to partial write (then you don’t have that flashing) something (updating a value) the screen looks then like its is in a snowstorm, gone is the beautifull white background.
@ the moment I’m trying to make a menu with a rotary… menu’s are 99.9% of the time static so theoretically a good candidate for epaper , if you don’t turn a knob or a switch it uses no energy.
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Portable you say?
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ghostbusters ?
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No hunting for rogue LoRaWAN nodes
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very nice 
Very nice
Hello All
Im from Jakarta, Indonesia
So much insteresting topic, thank you all for sharing, so many interesting ideas
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what filament do you use? it is wheather shield?
Where i can buy this module?
Hi Charles, these tyraps will get ‘brittle’ after a while and break (been there )
To be safe fit new ones once a year
- there are Stainless Steel Ty-Raps but expensive
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Whatever it does, it at least looks interesting. 
(even spotted a STM32 bluepill)
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