Date: Wed, 23 Jan 2019 11:53:10 +0000
From: Chris Wilson <dead.fets@gmail.com>
Message-ID: <3310676628.20190123115310@gmail.com>
To: Riccardo Zoli <rsgb_lf_group@blacksheep.org>
In-Reply-To: <CANA3B6XiSnx-PfL2yKSKrMo0ma_b51_SEBP95p6J=v26MjbjPw@mail.gmail.com>
References: <1762043626.20190104174530@gmail.com> <CANA3B6V=UBmf2hJcxOkH7p1hMuHaTBP3uduy7rL-=kL5Mw1p3Q@mail.gmail.com> <9410247640.20190104185544@gmail.com> <CANA3B6VefKy=hYMunqXtFJ18W=zB-Dj-htgNNv0=bJivS2T54g@mail.gmail.com> <1624085399.20190106110624@gmail.com> <CANA3B6UDWT69iZtOBgmP+csuU1FvK3nrbY_EpEE3J8JtnqJbvw@mail.gmail.com> <1288743451.20190107142430@gmail.com> <5C336344.7010308@posteo.de> <1854885531.20190107171609@gmail.com> <78801854.20190122210433@gmail.com> <CANA3B6XiSnx-PfL2yKSKrMo0ma_b51_SEBP95p6J=v26MjbjPw@mail.gmail.com>
MIME-Version: 1.0
Subject: Re: LF: Ublox 8 question
Content-Type: text/plain; charset=utf-8
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Content-Transfer-Encoding: 8bit


Hello Riccardo,

Thanks,  a  good  point I will be sure to bear in mind! I have further
info so will copy paste what i posted to the "Time Nuts" forum in case
it helps anyone else.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The Ublox M8T is now fixed! For future reference this is what was
wrong. CSG Shop ship various versions of this GPS module on a generic
board, as far as I can tell, and reading between the lines. Some
versions need this jumper across two of the three normally bare solder
pads. Mine seems to have "escaped" with a Neo_M8T but the jumper
soldered in place needed for NEO_M8L and NEO-M8U modules. Upon
removing it the device now outputs under control of the current
release of U-Centre software on TP0 and TP2. If anyone wants a photo
of how the pads should be for the M8T I can take one and link here.
But basically the M8T module should have NO jumpers across the three
pads on the reverse side of the board...A learning experience I could
have done without, but at least I have learnt something and it can now
be cased up :) Thanks to all for help here and by direct e-mail.


 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Tuesday, January 22, 2019, 9:55:18 PM, you wrote:


> Hi Chris,


> I'm glad you fix it, thank you for the info. I'm curious, Chris: what the blob was shorting?
> If you're planning on using 2nd timepulse, remember to decouple
> TP2/SAFEBOOT pin with an adequate capacitor, without charge the
> output in DC to GND (for example, directly with a resistive voltage
> divider), otherwise the module (at power on) starts in safeboot mode and remains inoperative.


> All the best


> 73 de Riccardo IW4DXW


-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com