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On 14/04/2020 09:51, Michael Everitt wrote:
Might be worth pointing out that this is being deployed in Colombia, which makes the NHS ventilator situation look like a Exclusive VIP state (I know about this as my father had to use private healthcare, but still died in this part of the world), and a £25 raspberry Pi is a month's wages for most people there. So paying £100,000+ for a Siemens type ventilator when you might need 5000 of the things is out of the question, if the Pi saves lives it is a good thing.On 14/04/20 09:46, Eion MacDonald wrote:On 13/04/2020 21:08, Gordon Henderson wrote:On Mon, 13 Apr 2020, Roland Tarver via list wrote:Hi Folks, BBC News - Coronavirus: Raspberry Pi-powered ventilator to be tested in Colombia https://www.bbc.co.uk/news/technology-52251286 Thought this was pretty cool. If it can be made to work.Bloody hell, I hope not. This is the job for a proper embedded microcotroller designed for the task. PIC or AVR style not some educational computer running a multi-user, multi-tasking operating system vulnerable to 1000 hacks )-: (And Yes, I have experience of this) GordonCan the OS on a R Pi be 'locked' to a single use and hardened? E.G. If on a machine not connected to internet, is this not just an 'air-gaped' computer? Similar to systems used in nuclear industry in UK , where very 'usual' PCs are air gapped inside a Faraday cage. (Disclosure: experience of using such machines.)The 'best of a bad bunch' would probably be to put an RTOS on the bare metal, and ditch any networking unless really necessary...
To give an indication of the situation, the doctors came to us and said, "your father needs a transfusion", we said fine, and had an awkward moment, the thing is they didn't have the blood, and wouldn't source it themselves, so they lent us a cool-bag with an ice pack and we had to go round the city to go and find and buy human blood for the transfusion. We did find a couple of pints at the red cross, as it happened, they had four matching his blood type, but would only sell us two, despite us trying to barter and haggle. $USD50 per pint, in case you are wondering.
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