STM32WL (Sub-GHz/LoRa) Training | Ac6 Training

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STR21STM32WL (Sub-GHz/LoRa)
This course descirbe the WL (Sub-GHz/LoRa) architecture and practical examples

Objectives

  • Understand STM32WL SoC (Cortex-M4 + integrated Sub-GHz radio).
  • Bring up CubeWL projects (SubGHz_Phy, LoRaWAN middleware).
  • Configure RCC, RF clocks, SMPS/VDDPA, and RF paths.
  • Build LoRa PHY links (SF/BW/CR, CAD, RX/TX).
  • Deploy LoRaWAN Class A (OTAA/ABP), ADR, MAC cmds, downlinks.
  • Apply low-power with radio; measure and tune current.
  • Handle keys/NVM, region params, production RF checks.
  • Theoretical course
    • PDF material in English (printed for face-to-face); online over Teams.
    • Trainer assistance throughout.
  • Practical activities (40-50% of duration)
    • Code examples, exercises and solutions.
    • Remote: one online Linux PC per trainee, with emulated or physical board as needed.
    • Face-to-face / on-site: one PC (one per two beyond six trainees), target board and install manual as needed.
  • Downloadable preconfigured VM to redo the labs afterwards.
  • Each session starts with a trainee check-in.
  • Any embedded systems engineer or technician with the above prerequisites.
  • Prerequisites are checked before the training.
  • Progress is assessed by the trainer through the practical exercises, and by quizzes for sections without exercises.
  • Each trainee receives a completion certificate.
  • If a prerequisite gap appears, alternative or additional training is offered.

Course Outline

  • Cortex-M4 core basics.
  • Radio subsystem blocks.
  • RFO_LP vs RFO_HP paths.
  • SMPS / VDDPA roles.
  • RF pins & routing.
Exercise:  SoC & RF map
  • Package structure (Drivers/MW).
  • SubGHz_Phy vs LoRaWAN.
  • Board/clock templates.
  • Minimal UART/LED setup.
  • Build & debug checks.
Exercise:  App skeleton
  • HSE/LSE choices.
  • PLL to SYSCLK.
  • RF timing sources.
  • CCIPR selectors.
  • MCO for verification.
Exercise:  Clock profiles
  • TX power config steps.
  • RFO_LP/H Pout ranges.
  • DC-DC vs LDO impact.
  • Antenna match notes.
  • PA ramp & duty cycle.
Exercise:  TX power table
  • SF / BW / CR fields.
  • Preamble & sync word.
  • CAD / RX timeout.
  • Payload length limits.
  • CRC/Invert IQ flags.
Exercise:  PHY ping-pong
  • Radio state machine.
  • IRQs: TX done / RX done.
  • Timeouts & errors.
  • TX/RX scheduling.
  • Simple CLI prints.
Exercise:  Event logger
  • Project layout (MW/LmHandler).
  • Join flow OTAA.
  • ABP fallback basics.
  • RX1/RX2 windows.
  • Confirmed vs unconfirmed.
Exercise:  Join + uplink
  • EU868 vs US915 notes.
  • Channels & sub-bands.
  • Dwell time/duty cycle.
  • LinkADRReq handling.
  • Data rate plan.
Exercise:  Region switch
  • ADR enable/disable.
  • SNR/RSSI reporting.
  • Rx win params tuning.
  • Confirmed retry policy.
  • App port mapping.
Exercise:  Downlink LED
  • Keys & key derivation.
  • DevEUI policy (from UID).
  • NVM/bond storage.
  • Reset and rejoin rules.
  • Basic key hygiene.
Exercise:  Key store check
  • Simple sensor interface.
  • Payload encode/FRMPayload.
  • FPort selection.
  • Uplink interval policy.
  • Error counters.
Exercise:  Temp uplink
  • Sleep/Stop policies.
  • Radio sleep/standby.
  • RTC tickless scheme.
  • Wake sources & latency.
  • Measurement method.
Exercise:  LP profiles
  • RSSI/SNR basics.
  • SF/BW impact.
  • Antenna orientation.
  • TX power vs battery.
  • Simple path-loss model.
Exercise:  Range walk
  • Freq dev & bit-rate.
  • Preamble & filter.
  • Packet format.
  • CRC settings.
  • Sensitivity trade-off.
Exercise:  FSK ping
  • LinkADRReq/DevStatusReq.
  • DutyCycleReq basics.
  • RXParamSetupReq.
  • NewChannelReq.
  • Error handling.
Exercise:  MAC trace
  • Boot/slots concept.
  • Image versioning.
  • Failure recovery.
  • Rollback notes.
  • Basic script use.
Exercise:  App OTA (demo)
  • Region & channels fixed.
  • TX power & duty policy.
  • Keys/NVM procedure.
  • RF test points noted.
  • UID/serial/CRC tags.
Exercise:  Self-audit
Duration
3 days
Inquiry

This course can be scheduled upon request. Click the 'Inquire' button to contact us.

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To book a training session or for more information, please contact us on info@ac6-training.com.

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This course can be provided either remotely, in our Paris training center or worldwide on your premises.

Scheduled classes are confirmed as soon as there is two confirmed bookings. Bookings are accepted until 1 week before the course start.

Last update of course schedule: 27 June 2026

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