51 lines
2.7 KiB
Markdown
51 lines
2.7 KiB
Markdown
WPJ428 + SIMCOM 8202G
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=====================
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<div style="margin:auto">
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<img src="img/boitier-v2.jpg" style="max-width: 600px"/>
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</div>
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**We see this project as a way to assess how well we can regain control/understanding on our NR5G/LTE routers.**
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*And for now the answer seems to be "very little"*.
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Our case study is a NR5G router as the main Internet access point in a place where we have no signal on our cellphones.
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Thus, we need external antennas that are put in the roof.
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Additionnaly, we want to maximizme the throughput (both RX and TX) and minimize latency while keeping a stable connection over time.
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Our project is currently made of the following physical parts:
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- A custom made case that is 3D printed - [Download files](./3D_model)
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- A Compex WPJ428 board - [wi-cat.ru](https://wikidevi.wi-cat.ru/Compex_WPJ428)
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- A Simcom 8202G modema - [official site](https://www.simcom.com/product/SIM8202GM2.html)
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- Connector: M.2 key B -> PCI Express x2, S-ATA, USB 2.0/3.0 (with HSIC/SSIC), I2C or Audio
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- Some antennas, the setup is not definitive yet
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- Log-Periodic Dipole Array (LPDA) Antenna - Directional antenna LTE 800/1800/2600 MHz, MIMO, SMA - [wimo](https://www.wimo.com/en/antennas/gsm-lte-mobile-phone-antennas/60072) - [diff between yagi and lpda](https://powerfulsignal.com/blog/whats-the-difference-between-an-lpda-antenna-and-a-yagi-antenna/)
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- A cheap cross antenna - [amazon](https://www.amazon.fr/gp/product/B00BBKKULW/ref=ppx_yo_dt_b_asin_title_o04_s00)
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- Some small wifi-like antenna - [wimo, similar but different](https://www.wimo.com/en/antennas/gsm-lte-mobile-phone-antennas/60022-sma)
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We try to document our journey here:
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- Guides
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- [Our own OpenWRT image for the WPJ428](./doc/compile.md)
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- [Flash OpenWRT on the WPJ428](./doc/flash.md)
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- [Manually connect a modem to the network](./doc/manual-modem.md)
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- [Our OpenWRT configuration](./doc/config.md)
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- Developped scripts
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- Problems we encountered
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- ✅ Dimensions for the board in the datasheet are wrong
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- ✅ Ethernet ports are not configured at boot
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- ✅ [The UDP+Don't Fragment bug](./doc/udp-df.md)
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- ⌛ [Tracking the bandwidth bottleneck](./doc/bottleneck.md)
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- ⌛ Signal is not optimal with an antenna under the roof
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- ⌛ Our modem never connects on NR5G Non StandAlone (NSA) aka E-utran New radio Dual Connectivity (EN-DC)
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- Experience Reports
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- [Measurements next to the eNodeB](./doc/next_antenna.md)
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- Misc
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- [Our prototype: the TP-Link TL-WDR 3600 + Huawei e3372h](./doc/proto.md)
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- [Some logs/data/info about our hardware](./doc/logs.md)
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- [Bibliography](./doc/bib.md)
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- [Some mostly useless hacks](./doc/hacks.md)
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