Comments on: Getting Started with LILYGO TTGO T-A7670G ESP32 (4G, GPRS, and GPS) https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/ Learn ESP8266, ESP32, Arduino, and Raspberry Pi Sat, 17 May 2025 10:50:39 +0000 hourly 1 https://wordpress.org/?v=6.8.1 By: Sara Santos https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1045135 Sat, 17 May 2025 10:50:39 +0000 https://randomnerdtutorials.com/?p=167043#comment-1045135 In reply to Johan.

Hi.
Are you using the correct library?
Please note that you need to use the same fork we’re using in the tutorial and not the original library.
Take a look at the troubleshooting tips at the end of the post.
Regards,
Sara

]]> By: Johan https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1045134 Sat, 17 May 2025 10:47:47 +0000 https://randomnerdtutorials.com/?p=167043#comment-1045134 I'm trying run your example, but get the error "Enable network failed!" when doing modem.setNetworkActive(). I can't find information on what could be the reason for this error. Could you (or anyone) point me in the right direction? I also tried to send a text message (SMS), copying code from another tutorial. This failed too. Any ideas on possible causes here? Everything works, when I use the SIM card in a phone.]]> First, thank you for yet another great tutorial 😊I’m trying run your example, but get the error “Enable network failed!” when doing modem.setNetworkActive(). I can’t find information on what could be the reason for this error. Could you (or anyone) point me in the right direction?
I also tried to send a text message (SMS), copying code from another tutorial. This failed too. Any ideas on possible causes here?
Everything works, when I use the SIM card in a phone.

]]> By: Shlomo Shamy https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1044362 Wed, 14 May 2025 19:36:11 +0000 https://randomnerdtutorials.com/?p=167043#comment-1044362 Very good explantion, Thank you!
everting is good until the IP address. IP address: empty and fail to connect to the HTTPS. What wrong?

]]> By: Sara Santos https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1019916 Wed, 26 Mar 2025 10:22:02 +0000 https://randomnerdtutorials.com/?p=167043#comment-1019916 In reply to Jan.

That’s great.
Thank you so much for supporting our work.
Regards,
Sara

]]> By: Jan https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1019742 Tue, 25 Mar 2025 15:57:46 +0000 https://randomnerdtutorials.com/?p=167043#comment-1019742 Dear Sara and dear Rui,

Thank you for the post.

Was just spending some days with coding around the A7670E without success but with stupid error messages……

…..then i saw this tutorial and read also the comments…..and BINGO !

….i hat to use the fork – and everything is working well right now.

PS: Recently i bought several of your E-Books/Courses and they are brilliant !!!

Best regards from Germany 🙂

Jan

]]> By: Sara Santos https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1017308 Mon, 17 Mar 2025 09:56:29 +0000 https://randomnerdtutorials.com/?p=167043#comment-1017308 In reply to Sohel.

Hi.
We mention in the tutorial:
4. Go to Tools > Board and select ESP32 Dev Module.

Are you using the right port to upload code to the board?
“3) In order to program your board, you must power it using the USB Type-C cable;”

Regards,
Sara

]]> By: Sohel https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1017270 Mon, 17 Mar 2025 05:32:32 +0000 https://randomnerdtutorials.com/?p=167043#comment-1017270 Hi, I bought a Lilygo TTGO A7670G with much excitement. But when I tried follow the above instructions to try out the board, I seem to be missing one vital information – what board do I select in Arduino IDE? Also, I can see about 5 com ports when I attach the board – does any work for programming it?

I tried several different ones like ESP32 Dev Module hoping that they are generic enough, but Arduino IDE aborts writing after compilation with te following error:

Connecting………………………………..
A fatal error occurred: Failed to connect to ESP32: Packet content transfer stopped (received 1 bytes)

Thanks in advance!

]]> By: tom https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1012156 Sat, 01 Mar 2025 12:33:26 +0000 https://randomnerdtutorials.com/?p=167043#comment-1012156 Hi there. Your site is truly a usefull resource for programming Arduino and ESP32. I was recently working with the Lilygo A7670G, namely I2C bus. I used their example sketch where they use pins 33 (SDA) and 32 (SLC) to establish I2C communication via the Wire(SDA,SLC) command and it works fine also with my board. But on the pin out the default pins for I2C are pins 22 and 21. Doing the same sketch with pins 22 and 21 usinf the wire(SDA,SLC) does not work. Do you know the reason ?

]]> By: Thomas https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1011936 Fri, 28 Feb 2025 18:18:13 +0000 https://randomnerdtutorials.com/?p=167043#comment-1011936 You Website is truly a good source for ESP issues. I am working nice a while with the Lilygo A7670G board. recently I was experimenting with I2C. In the example sketch which comes with the board they use pins 33 (SDA) and 32 (SCL) which is working fine also on my board. However in the pinout the default I2C pins are 22(SCL) and 21(SDA). When i try to use these pins using Wire(21,22) there is no connection. Actually if these pins are the default pins they should work with out explicit use them in the wire comand. Do you have any idea what the reason is ?

]]> By: Jaco https://randomnerdtutorials.com/lilygo-ttgo-t-a7670g-a7670e-a7670sa-esp32/#comment-1010692 Mon, 24 Feb 2025 19:16:13 +0000 https://randomnerdtutorials.com/?p=167043#comment-1010692 In reply to Jaco.

I have successfully sent a JSON string via HTTPS protocol to a server, however I had to update the firmware on my A7670E device to the latest version.

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