2 ms·
"The Helium Protocol uses a modified-802.15.4 frame for transport, and existing ZigBee deployments can be retrofitted to run Helium." They are using something
by mgraczyk 12y ago
"The Helium Protocol uses a modified-802.15.4 frame for transport, and existing ZigBee deployments can be retrofitted to run Helium."
They are using something similar to 802.15.4 for at least their physical layer. If their power numbers are correct, then they are probably not using any of the specified 802.15.4 physical layers exactly to spec.