15 years with this Yamaha CG101 and it still sounds great. First real classical I bought as a student — never felt the need to upgrade. Anyone else still playing the guitar they started on?
Sensor node prototype with four radios on one board - LoRa (RAK11720), BLE, WiFi (BW16) and GPS, with an MSP430 as host.
The tight part was RF coexistence and keeping the antenna keep-outs clean on a board this size while still fitting the host MCU and power. 4-layer, GND pour on inner layers.
Happy to hear what you'd have routed differently.
Working on a battery-powered sensor node with periodic LoRa uplinks plus opportunistic WiFi sync when in range. Two-board approach.
Host MCU is an MSP430FR6972 — chose it for the FRAM (no separate EEPROM, fast writes during power-loss recovery) and the ultra-low standby current. RAK11720 acts as LoRa+BLE coprocessor over UART, BW16 handles WiFi separately on the carrier. GPS is the LC76G with a passive patch in the lid.
Carrier-daughter split was driven by needing to swap radio modules during development without redesigning the whole stack. Already tested with two daughter board revisions.
Open to questions on the layout decisions or the power architecture.