Author Topic: ATmega328P for OpenTRV use  (Read 37942 times)

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frackers

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Re: ATmega328P for OpenTRV use
« Reply #66 on: November 15, 2016, 04:56:47 PM »
A particularly nice feature of the AVR/328P is the 100k single-byte-writeable EEPROM, and few ARM variants seem to have something equivalent, though we have found a 50 cent device that is close and are doing some preliminary design around it.

I've been using the STM32 series micros for a while now and I'm very impressed. One project uses a STM32F303xC which has 256k ROM, 48k RAM, I'm using an external SPI NOR flash of 8Mbytes (W25Q64FV) to replace the EEPROM. So far I'm using 4 out of the 5 UARTs - 2 with hardware flow control, 10 DMA channels, 10 of the timers, SPI, I2C, DAC, 14 of the ADC channels and I can still put it to sleep with a current consumption below 50uA!!

Just having an decent IDE with multiple real-time breakpoints has improved productivity 3-4 fold.

The STM32F103 boards that I started with are a couple of dollars and the USB debugger is the same price. Even going up to a STM32F3 series Nucleo board which has the debugger as a "snap-off" PCB gives you change out of $20.

Steep learning curve but you'll be ahead within 6 months.

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DamonHD

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Re: ATmega328P for OpenTRV use
« Reply #67 on: November 16, 2016, 03:15:03 AM »
Thanks!

Damon
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DamonHD

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Re: ATmega328P for OpenTRV use
« Reply #68 on: September 30, 2020, 04:10:12 PM »
Time for a little update...

Radbot was today officially listed in the "SAP" (Standard Assessment Procedure) table for UK energy-saving gadgets (as a time and temperature zone control), which means that also from today it's eligible for partial subsidy under the UK's new Green Home Grant scheme.   And shortly we should get lifetime savings for the ECO3 scheme.

Of course, nothing stops people buying Radbot direct from us or via Amazon!

Separately, yesterday evening, I met up with a long-time OpenTRV/Radbot tester to listen to bats for an hour at my next-door cemetery!

https://www.earth.org.uk/bats-at-16WW.html#2020-09-29

Rgds

Damon
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SparWeb

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Re: ATmega328P for OpenTRV use
« Reply #69 on: October 01, 2020, 08:52:18 PM »
Congratulations - - - again!

Cool bat songs!  I hope they enjoyed the feast they surely were collecting with those chirps.
This evening a grey jay visited my back yard - a very rare sight in the west on the prairies!  I knew it before I saw it, by the call of the jay.  Very common where I grew up (in the east) but it's been at least a decade since I last heard one, maybe two.
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DamonHD

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Re: ATmega328P for OpenTRV use
« Reply #70 on: November 28, 2020, 05:25:01 PM »
A couple of updates:

1) Here's a talk I gave two weeks ago, virtually, rather further from home than I would usually travel physically for such an event:

    https://www.earth.org.uk/smart-radiator-valves-talk-20201112.html

2) Radbot won the EI's Innovative Technology Award:

    https://twitter.com/EnergyInstitute/status/1331940017669857281

I had to 'collect' the award virtually at short notice (our CEO was meant to, but she was called away for other things)!

Rgds

Damon

PS. Without covid I probably would not have been able to do either...
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Bruce S

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Re: ATmega328P for OpenTRV use
« Reply #71 on: November 28, 2020, 05:48:05 PM »
Congrats!!
I'll take an extra coffee or two and have a listen

B
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