Figure 8: Sample hardware reference design integration for the Swarm Modem. This is a low noise buck-boost-solar
charger example with the Swarm Modem (reference design files can be found at www.swarm.space/developertools/ ).
A 6-pin serial programming header (upper-left of image) is highly encouraged so that the Modem firmware can be
easily updated in the future. Qty 3 18650 lithium rechargeable batteries in parallel are used in this reference design.
The circuit fits into BUD Industries IP68 waterproof case Model # PU-16533-C, with the use of 4 standoffs.
November 2021 Swarm M138 Modem Manual - Rev 1.00 26/77
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