nRF5 action!
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@scalz said in nRF5 Bluetooth action!:
@NeverDie
i would have unsoldered the last pad of the passive before the antenna feed point to disable it, and would have soldered the wire antenna to passive, so without scratching anything ;) but i have no idea about nrf51 range, i'm not using this mcu :simple_smile:
I have my own design for soil moisture..not really interested by "chirp" like sensors, but i agree nrf52 are nice mcu.If you feel like posting it, I'd certainly be interested in a good soil moisture sensor. :)
This is the only nRF51 I've tried, but @rmtucker seems to be getting good range (beyond his garden) with his nRF51. I previously drank the Kool-aid and thought the nRF52 generally performs better, but I'm not I'm not really sure anymore.
@NeverDie
What are you using at the other end,just a standard nrf24 or the amplified version.
I switched to rfm69 some time ago because of poor range/coverage.
But i am astounded with the nrf51 and wemos/nrf24 pa setup.
Maybe it is the tin foil wrapping Lol.😃 -
@NeverDie
What are you using at the other end,just a standard nrf24 or the amplified version.
I switched to rfm69 some time ago because of poor range/coverage.
But i am astounded with the nrf51 and wemos/nrf24 pa setup.
Maybe it is the tin foil wrapping Lol.😃 -
@rmtucker
I did eventually manage to stop it by putting it in the fridge.
My other half has never laughed so much.😃😃@rmtucker said in nRF5 Bluetooth action!:
@rmtucker
I did eventually manage to stop it by putting it in the fridge.
My other half has never laughed so much.😃😃If you switch to Lithium batteries (I'm partial to the Energizer AA's because they have good datasheets), your node should still work even in the freezer.
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@NeverDie
What are you using at the other end,just a standard nrf24 or the amplified version.
I switched to rfm69 some time ago because of poor range/coverage.
But i am astounded with the nrf51 and wemos/nrf24 pa setup.
Maybe it is the tin foil wrapping Lol.😃@rmtucker said in nRF5 Bluetooth action!:
@NeverDie
What are you using at the other end,just a standard nrf24 or the amplified version.
I switched to rfm69 some time ago because of poor range/coverage.
But i am astounded with the nrf51 and wemos/nrf24 pa setup.
Maybe it is the tin foil wrapping Lol.😃I did it both ways when with datarates of 250kbps and 1Mbps, but when I upgraded the nRF52832 to 2Mbps, the connection stopped working. For expediency, I switched to an nRF52 DK as the gateway, rather than debug the nRF24 just then. Eventually I'll circle back and try to figure out what the problem is/was with the 2Mbps on the nRF24's. So, the nRF52 DK is what I'm presently using.
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@rmtucker
I did eventually manage to stop it by putting it in the fridge.
My other half has never laughed so much.😃😃@rmtucker
On the supercapacitor subject.
Nick Gammon used a 0.47uf 5.5v capacitor and you have been trying a 10uf 2.7v.
So i was going to try a 4uf 5.5v super cap and an mcp1700-33 to power the nrf at 3.3v.
I was going to charge the supercap initially with an adjustable dc-dc converter set to 5v while experimenting,anyone see a problem? -
@rmtucker
On the supercapacitor subject.
Nick Gammon used a 0.47uf 5.5v capacitor and you have been trying a 10uf 2.7v.
So i was going to try a 4uf 5.5v super cap and an mcp1700-33 to power the nrf at 3.3v.
I was going to charge the supercap initially with an adjustable dc-dc converter set to 5v while experimenting,anyone see a problem?@rmtucker said in nRF5 Bluetooth action!:
@rmtucker
On the supercapacitor subject.
Nick Gammon used a 0.47uf 5.5v capacitor and you have been trying a 10uf 2.7v.
So i was going to try a 4uf 5.5v super cap and an mcp1700-33 to power the nrf at 3.3v.
I was going to charge the supercap initially with an adjustable dc-dc converter set to 5v while experimenting,anyone see a problem?I'm assuming Nick Gammon was using not an Nordic radio but just an atmega chip? I don't think you'll get much runtime on a 0.47uF supercap, nor a 4uF supercap, because of the radio.
On the plus side, it should charge up almost instantly. :)
On the other hand, 100uF should be enough to send at least one packet. I haven't tried that low an amount on the nrf52, but I have done it with a 100uF (charged to 2.7v) powering an atmega328p+RFM69 combo.
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@rmtucker said in nRF5 Bluetooth action!:
@rmtucker
On the supercapacitor subject.
Nick Gammon used a 0.47uf 5.5v capacitor and you have been trying a 10uf 2.7v.
So i was going to try a 4uf 5.5v super cap and an mcp1700-33 to power the nrf at 3.3v.
I was going to charge the supercap initially with an adjustable dc-dc converter set to 5v while experimenting,anyone see a problem?I'm assuming Nick Gammon was using not an Nordic radio but just an atmega chip? I don't think you'll get much runtime on a 0.47uF supercap, nor a 4uF supercap, because of the radio.
On the plus side, it should charge up almost instantly. :)
On the other hand, 100uF should be enough to send at least one packet. I haven't tried that low an amount on the nrf52, but I have done it with a 100uF (charged to 2.7v) powering an atmega328p+RFM69 combo.
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@rmtucker said in nRF5 Bluetooth action!:
mcp1700-33
It appears to be just an LDO. So, you won't get any advantage to charging your capacitor to greater than 3.3v.
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@NeverDie
I think he was using an nrf24 just the same as us.
He was getting 32hours without re-charging and transmitting every 5mins.@rmtucker said in nRF5 Bluetooth action!:
@NeverDie
I think he was using an nrf24 just the same as us.
He was getting 32hours without re-charging and transmitting every 5mins.Really? Wow. That I'd like to see. I don't see how it's even possible. Do you have a link?
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@rmtucker said in nRF5 Bluetooth action!:
@NeverDie
I think he was using an nrf24 just the same as us.
He was getting 32hours without re-charging and transmitting every 5mins.Really? Wow. That I'd like to see. I don't see how it's even possible. Do you have a link?
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@rmtucker
On the supercapacitor subject.
Nick Gammon used a 0.47uf 5.5v capacitor and you have been trying a 10uf 2.7v.
So i was going to try a 4uf 5.5v super cap and an mcp1700-33 to power the nrf at 3.3v.
I was going to charge the supercap initially with an adjustable dc-dc converter set to 5v while experimenting,anyone see a problem?@rmtucker said in nRF5 Bluetooth action!:
Nick Gammon used a 0.47uf 5.5v capacitor
Re-read your link. He used a 0.47F capacitor, not a 0.47uF capacitor. That's a million times difference.
0.47F works. I arrived at 10F because it seems to be a sweet spot in the way that supercaps are priced. You can get a lot of Farads for just $2.
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@rmtucker said in nRF5 Bluetooth action!:
Nick Gammon used a 0.47uf 5.5v capacitor
Re-read your link. He used a 0.47F capacitor, not a 0.47uF capacitor. That's a million times difference.
0.47F works. I arrived at 10F because it seems to be a sweet spot in the way that supercaps are priced. You can get a lot of Farads for just $2.
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@NeverDie
My Mistake but his results were impressive don't you think?
Anyway i was just going to use 4f because i can get one.
How are you charging your Cap?@rmtucker said in nRF5 Bluetooth action!:
How are you charging your Cap?
6v mini solar panel run through diode and a 2.7v ldo. That works for me indoors even 15-20 feet away from a window.
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@rmtucker said in nRF5 Bluetooth action!:
How are you charging your Cap?
6v mini solar panel run through diode and a 2.7v ldo. That works for me indoors even 15-20 feet away from a window.
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@NeverDie
Hmm the only 2.7v ldo i can see are surface mount in the uk.
Thats a no no for me.@rmtucker said in nRF5 Bluetooth action!:
@NeverDie
Hmm the only 2.7v ldo i can see are surface mount in the uk.
Thats a no no for me.Yeah, I'm using surface mount, but I solder it on manually the old fashioned way. Not all surface mount are difficult just because they're SMD. Simply avoid the ones with too small a pitch.
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@rmtucker said in nRF5 Bluetooth action!:
@NeverDie
Hmm the only 2.7v ldo i can see are surface mount in the uk.
Thats a no no for me.Yeah, I'm using surface mount, but I solder it on manually the old fashioned way. Not all surface mount are difficult just because they're SMD. Simply avoid the ones with too small a pitch.
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Where is the sleep(...) function defined for the nrf5? I've looked, but I can't seem to find which library it is in. Anyone know?
@NeverDie said in nRF5 Bluetooth action!:
Where is the sleep(...) function defined for the nrf5? I've looked, but I can't seem to find which library it is in. Anyone know?
It's defined in "hal/architecture/MyHwNRF5.cpp"
