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HP2DFA > TECH 04.10.26 00:20z 38 Lines 1564 Bytes #999 (0) @ WW
BID : 2719_HP2DFA
Subj: HIDDEN SDR CAPABILITIES DISCOVERED IN ESP32 CHIPS
Path: HB9ON<HB9ON<PI8ZTM<PY2BIL<HP2DFA
Sent: 261003/2306Z 2719@HP2DFA.#COL.PAN.CEAM BPQ6.0.24
Title: HIDDEN SDR CAPABILITIES DISCOVERED IN ESP32 CHIPS
SB ALL @ PANAMA
HIDDEN SDR CAPABILITIES DISCOVERED IN ESP32 MICROCONTROLLERS
TECHNICAL AND INNOVATION BULLETIN
RAW IQ BASEBAND SAMPLING AND APPLICATIONS AT 2.4/5 GHZ
VALID: 03-OCT-2026 ONWARDS
ISSUED VIA BPQ32 NODE HP2DFA-5
1. TECHNICAL DISCOVERY:
- MULTIPLE PROJECTS (ESPARGOS AND INDEPENDENT DEVELOPERS) DISCOVERED AN
UNDOCUMENTED FEATURE IN ESP32 CHIPS THAT BYPASSES FIXED WIFI/BT STACKS
TO CAPTURE RAW BASEBAND IQ SAMPLES.
- COVERAGE: 2.2 - 2.7 GHZ (AND 4.8 - 6.0 GHZ ON ESP32-C5).
- SAMPLE RATE: UP TO 80 MS/S.
- ANALOG BANDWIDTH: 13 TO 54 MHZ DEPENDING ON CHIP MODEL.
2. APPLICATIONS AND STREAMING LIMITATIONS:
- GENERAL OUTPUT: DATA OUTPUT IS BANDWIDTH-LIMITED ON MOST CHIPS,
EXPORTING SNAPSHOTS (USEFUL FOR SPECTRUM ANALYZER FUNCTIONS).
- ESP32-S31 EXCEPTION: STREAMS CONTINUOUSLY UP TO 16 MS/S VIA GIGABIT ETHERNET
(SOAPYSDR DRIVER FOR GNU RADIO AND GQRX COMING SOON).
- ESPARGOS PROJECT: ENABLES PHASE-COHERENT DIRECTION FINDING ON ANY SIGNAL
WITHIN THE 2.4 GHZ BAND.
- ESP-WEBSDR: WEBPAGE ALLOWS DIRECT FIRMWARE FLASHING FROM BROWSER TO VIEW
LIVE SPECTRUM AND WATERFALL.
3. COMPLEMENTARY FPGA DEVELOPMENTS:
- /U/H0M3US3R PROJECT (REDDIT/GITHUB): USES AN FPGA AS A USB3 FRONT-END
WITH AN ESP32-S3 FOR CONTINUOUS IQ STREAMING TO PC.
- POTENTIAL: ONCE CLOCK PHASE NOISE ISSUES ARE RESOLVED, IT COULD SERVE AS A
STANDARD GENERAL-PURPOSE SDR (LIKE RTL-SDR) IN 2.2-2.8 GHZ WITH UP TO
80 MHZ BANDWIDTH.
MAIL: HP2DFA@GMAIL.COM / HP2DFA-5@BPQ32
73 DE HP2DFA-5 / BPQ32 NODE PANAMA
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