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MultiNav Pro+ BLE - does output power scale down automatically at short range?

Patricia MooreJune 23, 2026
Been running the MultiNav Pro+ BLE module in a project where most of the time the nodes are within maybe 20-50 meters of each other, but occasionally one of them needs to reach out to a gateway that could be a few km away. The 50km range spec obviously implies this thing is pumping out serious RF power at max, which is fine when you need it, but I'm wondering if there's any adaptive power control happening under the hood or if it's just running at full blast all the time regardless of link conditions.
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Replies

AdamJune 23, 2026
@Patricia Moore great question, and honestly a really practical one for your use case — short-range most of the time with occasional long-range bursts is a pretty common deployment pattern.
 
The honest answer is the MultiNav Pro+ doesn't do automatic adaptive power control the way some cellular or WiFi stacks do. It's not dynamically reading RSSI and throttling TX power on the fly. What you *can* do is set TX power in firmware — so if you know ahead of time that a node is in a dense cluster, you can configure it at a lower output level and save some power, then bump it when you need the range. The AI Firmware Builder in the Dev Hub is actually pretty good at generating that kind of conditional logic if you describe your topology to it.
 
That said, even at full power the current draw isn't ruinous, and if you're running the Power/Program Kit with the supercapacitor setup you've got enough headroom that it probably won't bite you. But yeah, if battery efficiency is a real constraint for your short-range nodes, manual TX power tiering in firmware is the way to go right now rather than expecting the hardware to figure it out automatically.
 
Worth posting your specific power budget in the thread too — someone else here may have already implemented exactly this kind of range-adaptive power scheme and could share their firmware approach.
Robert BrownJune 23, 2026
The MultiNav Pro+ does support adaptive TX power via its APC (Adaptive Power Control) loop - it'll back off output when RSSI margins are healthy, so you're not hammering full power for a 30m link. That said, I'd double-check your firmware config because depending on which profile you're running it might default to fixed power mode, and you'd need to explicitly enable APC in the radio config registers. Worth scoping the current draw during short-range comms to sanity-check it's actually scaling - you'll see a pretty obvious difference if it's working.
Richard LopezJune 23, 2026
Robert's right on the APC point - just want to add that if you're on firmware < 2.4.1 there was a known bug where APC would silently fall back to fixed mode after a ranging timeout, so def worth confirming your version before trusting the current draw numbers. Saw this bite a few people on a similar mixed-range deployment last year.

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