Don't blame you!!
Thanks Jim for the tip, I'll advise Alby that's what we want for the next batch.
To connect 5 Volt external inputs like coming from Wireless chargers or PoGo input pins you can use both red marked pins.The one beside the USB port has less other parts around and is easier to solder.
Lilygo T5 with onboard USB converter in B74 and BN versions.
Fine solder tip is advisable anyway.
Paco
Select to expand quoteveton said..
Why not soldering + to Vbat and - to ground? much easier..
The problem is that most QI chargers deliver 5V output. A lipo has a max charging voltage of 4.2V. So, with a full lipo, the voltage will go to high and can destroy the lipo, or worse, the lipo can set fire. Luckily, the lipos that we use have a internal cutoff circuit, so the lipo is disconnected if the voltage go over 4.2V. Never the less, in my opinion is this not good practive. However, there are QI chargers with a output of 4.2V, these can be connected directly to Vbat.
thanks Jan, I wasn't aware the charge receivers came in 4.2V. I've ordered a few (same price) to test out. I will go that way in future as simple to solder to Vbat and don't need to extend the USB plug. The issue with the Qi charge receivers is they run quite hot, especially if not perfectly aligned so never charge more than an hr or so. The 4.2V versions should be more efficient and run cooler..in theory..will see if that is the case.
Since I found that option in the build manual, I'm using it. (Vbat+Gnd) I find it much easier if you don't have really good skills at soldering, you can ruin the board, as it happened to me..
I'm using these little coils in the marked pins, they deliver no more than 4,1 V . I hope that is enough protection in addition to the Lipo protection. The other pins give 5V.
es.aliexpress.com/item/1005008622419534.html?spm=a2g0o.order_list.order_list_main.95.3a19194dmyW638&gatewayAdapt=glo2esp
Hello!
Just about to purchase the parts from AliExpress, but I have been having a look at the Wireless communication systems, Meshtastic and Meshcore.
It looks like these are using an Arduino board from to receive and send the signal. How difficult would it be to create the GPS tracker with one of these boards? So using the LILYGO T3 S3 E-Paper ESP32-S3 ? Would it affect the GPS logging and would it still be allowed on the speedsites?
Just throwing it out there to be honest, think emergency message for help etc. Rather texting my wife I coming home, get the beer chilled!
Cheers
Rob
Select to expand quoterp6conrad said..veton said..
Why not soldering + to Vbat and - to ground? much easier..
The problem is that most QI chargers deliver 5V output. A lipo has a max charging voltage of 4.2V. So, with a full lipo, the voltage will go to high and can destroy the lipo, or worse, the lipo can set fire. Luckily, the lipos that we use have a internal cutoff circuit, so the lipo is disconnected if the voltage go over 4.2V. Never the less, in my opinion is this not good practive. However, there are QI chargers with a output of 4.2V, these can be connected directly to Vbat.
Like Jan said some Qi receivers only give 5 volt as output.
The Qi board Veton showed however is a 2 in 1 board.
VOUT gives 5 volt and needs to go to the red marked spots which go to the Lilygo T5 build in charger IC TP4054.
BAT is an output which is a Lipo charge output and provide max 4.2 volt and regulate and controls the charging process.
The led onboard provide the status.
You can see this as a bonus output if your device does not have a charge circuit included.
Paco
Select to expand quotemerlincat said..
Hello!
Just about to purchase the parts from AliExpress, but I have been having a look at the Wireless communication systems, Meshtastic and Meshcore.
It looks like these are using an Arduino board from to receive and send the signal. How difficult would it be to create the GPS tracker with one of these boards? So using the LILYGO T3 S3 E-Paper ESP32-S3 ? Would it affect the GPS logging and would it still be allowed on the speedsites?
Just throwing it out there to be honest, think emergency message for help etc. Rather texting my wife I coming home, get the beer chilled!
Cheers
Rob
Meshtastic / Meshcore are Wireless meshsystems which rely on nearby nodes to communicate. Distance node to node is limited, and more in the range of 1000 meter. As these devices are relatif rare now, I do not believe that this is a reliable system for emergency calls. A ESP32 S3 has not a build in Mesh radio, so a extra module should be needed. This can be done without affecting GPS functions.
Use of the ESP32 S3 is certainly possible, but you need to use ESP32 Library 2.x (1.x has no S3 support) and some changes in the SW. Also a TFT display needs changes in the code.
Select to expand quotePacoRaapNL said..
To connect 5 Volt external inputs like coming from Wireless chargers or PoGo input pins you can use both red marked pins.The one beside the USB port has less other parts around and is easier to solder.
Lilygo T5 with onboard USB converter in B74 and BN versions.
Fine solder tip is advisable anyway.
Paco
I have to correct an error!
The spots that are connected to put external 5 volts on are not the red squares but the green squares.
Sorry for this mistake.
For those who look at the circuit as being a "WHAT IS THIS"?
I connected the loose ends for clarification.
VBUS is connected to the input from the USB connector so 5V comes in from there.
D7 and D8 are diodes with a fuse function.
They make sure that both give their voltage onto the switch.
They also make sure the USB 5V (VBUS) is not directly connected to the battery VBAT and vice versa.
Voltage goes through the blue arrow direction not against it.
Work in progress.
New 2026 version in the color lime green 
The new formula Polymaker PETG used.
Easier way to enclose the main base with the acrylic tape and 0.3 mm PET or PVC sheet.
The black part is a sacrifice sheet so the acrylic tape does not change in form as it is very flexible and sticky when you need to remove the red side cover layer.
Cut along the outer edge of the main base and place the top cover.
Secure it with the 3 mm carbon rods.
Paco
