TetraSpot TMO mini BTS on Raspberry Pi 5
Beta TetraSpot built on Raspberry Pi 5 with SDR Semtech SX1255 (400-510 MHz, 4 dBm) — full home coverage. Target version: AD9361 + class A amplifier.
2026-02-142:442,903 views
Videos from TETRA Poland projects, run by SP8MB. We show the bring-up of our own base station TetraSpot (TETRA hotspot) on Raspberry Pi 5, TETRA TMO/DMO repeaters in the 70 cm HAM band, integration with the BrandMeister network and Android/ATAK clients. 15 videos.
TetraSpot demos — our TETRA base station (TETRA hotspot) on Raspberry Pi 5 with SDR radio. Voice calls, SDS, SIP, clients.
Beta TetraSpot built on Raspberry Pi 5 with SDR Semtech SX1255 (400-510 MHz, 4 dBm) — full home coverage. Target version: AD9361 + class A amplifier.
SIP/PABX gateway in TetraSpot — connecting the TETRA network with VoIP telephony. Individual TETRA ↔ SIP calls.
RF test of the TetraSpot base station with SDR sxceiver radio — actual TX power measurement and π/4-DQPSK constellation diagram.
TetraSpot — early bring-up of the TETRA base station on Raspberry Pi 5.
ESP32 with a 3.5" display as a TetraSpot network client — a software TETRA terminal on a microcontroller.
Breakthrough day: group calls running on the Mini TETRA Hotspot. UDP audio bridge exposes audio to other apps. Stack: RPi5 + SDR sxceiver.
TETRA TMO and DMO repeaters in the 70 cm amateur band — Motorola EBTS, Cleartone CM5000, interconnect with BrandMeister and the analog network via svxlink.
TETRA DMO repeater Motorola Cleartone CM5000 (SR8LSD) with MTH800, CEP400, MTP3500, MTP850 radios. Group and individual calls, SDS, status messages, APRS. TX 430.025 / RX 431.625 MHz.
Bridge between TETRA and analog FM. TETRA side: CM5000 as SR8LSD repeater + MTM800E as svxlink interconnect and APRS client. Analog side: Motorola Quantar SR8LSW + Yaesu FT-991a, Harris P7100, AnyTone.
TETRA TMO repeater Motorola EBTS on the HAM band, callsign SR8LST. Connected to TetraPack and BrandMeister via TG20 TETRA-POLAND.
TETRA TMO repeater Motorola EBTS in the BrandMeister network — DMR interconnect via TG20 TETRA-POLAND.
Motorola MTP700 with MTP750 firmware works flawlessly with the DMO Cleartone CM5000 SR8LSD repeater. Frequency 430.025, MCC 260, NMC 16383.
MTP700 converted to HAM frequency in Wide Trunking mode via EBTS connected to the TetraCore network. Frequency 438.375, shift 8 MHz, MCC 901, NMC 9999, Lublin.
TETRA TMO repeater playing back audio from the DMR BrandMeister network — TETRA ↔ DMR bridge.
Client apps for the TETRA network — Android (TetraPoland) and ATAK Plugin for the tactical map with PTT, SDS and LIP.
TAK/ATAK plugin enabling chat (SDS), location reporting (LIP/CoT), talkgroup switching, PTT and RX monitor from a Motorola MXP600 radio connected via Bluetooth or USB.
TetraPoland Android app working with TetraSpot base stations via the Tetra-Poland HUB. Software TETRA terminal on a phone — PTT, SDS, talkgroups.