Help with SIM800L LillyGo T-Call

ESPHome
1

Hi there, I am trying to configure a SIM800L with Serial GPS and the LillyGo T-Call.

I cant seem to get it working with 2 UARTs.

Any ideas? I can get the SIM800L working when GPS is disabled and have not yet been able to get any data out of the GPS.

Thanks

esphome:
  name: 
  friendly_name: 

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable Home Assistant API
api:
  encryption:
    key: ""

ota:
  - platform: esphome
    password: ""

logger:

web_server:
  port: 80
  log: true
  local: True
  include_internal: true
  version: 3
  auth:
    username: !secret web_server_username
    password: !secret web_server_password

wifi:
  networks:
  - ssid: !secret wifi_ssid
    password: !secret wifi_password
    bssid: 
  fast_connect: true
  power_save_mode: none

uart:
    rx_pin: GPIO5
    tx_pin: GPIO4
    baud_rate: 9600

gps:
  latitude:
    name: "Latitude"
  longitude:
    name: "Longitude"
  altitude:
    name: "Altitude"

# GPS as time source
time:
  - platform: gps

Log output:

[09:31:30][C][wifi:600]: WiFi:
[09:31:30][C][wifi:428]:   Local MAC: 
[09:31:30][C][wifi:433]:   SSID: [redacted]
[09:31:30][C][wifi:436]:   IP Address: 
[09:31:30][C][wifi:440]:   BSSID: [redacted]
[09:31:30][C][wifi:441]:   Hostname: [redacted]
[09:31:30][C][wifi:443]:   Signal strength: -57 dB ▂▄▆█
[09:31:30][C][wifi:447]:   Channel: 11
[09:31:30][C][wifi:448]:   Subnet: 255.255.255.224
[09:31:30][C][wifi:449]:   Gateway: 
[09:31:30][C][wifi:450]:   DNS1: 
[09:31:30][C][wifi:451]:   DNS2: 0.0.0.0
[09:31:30][C][logger:185]: Logger:
[09:31:30][C][logger:186]:   Level: DEBUG
[09:31:30][C][logger:188]:   Log Baud Rate: 115200
[09:31:30][C][logger:189]:   Hardware UART: UART0
[09:31:30][C][uart.arduino_esp32:151]: UART Bus 1:
[09:31:30][C][uart.arduino_esp32:152]:   TX Pin: GPIO4
[09:31:30][C][uart.arduino_esp32:153]:   RX Pin: GPIO5
[09:31:30][C][uart.arduino_esp32:155]:   RX Buffer Size: 256
[09:31:30][C][uart.arduino_esp32:157]:   Baud Rate: 9600 baud
[09:31:30][C][uart.arduino_esp32:158]:   Data Bits: 8
[09:31:30][C][uart.arduino_esp32:159]:   Parity: NONE
[09:31:30][C][uart.arduino_esp32:160]:   Stop bits: 1
[09:31:30][C][web_server:145]: Web Server:
[09:31:30][C][web_server:146]:   Address: 
[09:31:30][C][mdns:116]: mDNS:
[09:31:30][C][mdns:117]:   Hostname: 
[09:31:30][C][esphome.ota:073]: Over-The-Air updates:
[09:31:30][C][esphome.ota:074]:   Address: 
[09:31:30][C][esphome.ota:075]:   Version: 2
[09:31:30][C][esphome.ota:078]:   Password configured
[09:31:30][C][safe_mode:018]: Safe Mode:
[09:31:30][C][safe_mode:020]:   Boot considered successful after 60 seconds
[09:31:30][C][safe_mode:021]:   Invoke after 10 boot attempts
[09:31:30][C][safe_mode:023]:   Remain in safe mode for 300 seconds
[09:31:30][C][api:139]: API Server:
[09:31:30][C][api:140]:   Address: 
[09:31:30][C][api:142]:   Using noise encryption: YES
[09:31:36][D][sensor:094]: 'Latitude': Sending state -1.00000 ° with 6 decimals of accuracy
[09:31:36][D][sensor:094]: 'Longitude': Sending state -1.00000 ° with 6 decimals of accuracy
[09:31:36][D][sensor:094]: 'Altitude': Sending state -1.00000 m with 1 decimals of accuracy

IMG_2425
IMG_24254032×2268 1.99 MB

2

Come on Dean, you know we’ll need logs. And the entire yaml. We can’t even tell what processor you are using!

3

Sorry Nick, post updated.

I’ve also removed everything relating to the sim600L as I know that works, and am just trying to get data from the GPS now which I cannot get anything from.

4

Do you have a datasheet for the gps board?

5

I would have to try and dig one up, which I will do.

However it came off a working project from a raspberry pi. I know it was outputting NMEA sentences and I’m like 95% sure at 9600.

Edit: found the GPS module, it’s a TBS M8 GPS unit

6

First reference I found, you appear to have wired it different to what they show. They show tx/rx as the middle two pins. You seem to show the tx/rx on the end two pins. Hard to say as it is pretty blurry.

Also there are LEDs which show what is happening, what do they tell you?

7

Yea I am aware of that, in my testing I am swapping the tx and rx pins in the esphome code each time I test.

After some time, I assume when I have a 3d fix, I am getting a green flashing led.

8

Could it be the PINs I am using for UART,

Mabe they are not able to be used as a UART?

GPIO4
GPIO5

9

Could you please post a better photo.