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Heltec LoRa 32 v3.1 include in v3.0 tab

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Merged them into the same tab as they use the same v3 firmware.
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James 2024-02-09 16:33:18 -07:00 committed by GitHub
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33
docs/hardware/devices/heltec/index.mdx
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@ -15,7 +15,6 @@ defaultValue="v3.1"
values={[
{label: 'LoRa32 V2.1', value: 'v2.1'},
{label: 'LoRa32 V3', value:'v3'},
{label: 'LoRa32 V3.1', value:'v3.1'},
{label: 'Wireless Stick Lite V3', value:'Wireless Stick Lite V3'},
{label: 'Wireless Tracker', value: 'tracker'},
{label: 'Wireless Paper', value: 'paper'}
@ -55,6 +54,23 @@ Not recommended because of design issues! Support is being phased out. Use V3 in
<TabItem value="v3">
## HELTEC v3.1
Use the same V3 firmware files as V3.1 as the hardware is nearly identical. On the top right side of the board where it normally says "V3" next to the U.FL/IPEX antenna connector, there is a "V3.1" instead of "V3". These started appearing around November 2023.
[V3.0 schematic](https://web.archive.org/web/20221127054612/https://resource.heltec.cn/download/WiFi_LoRa32_V3/HTIT-WB32LA(F)_V3_Schematic_Diagram.pdf)
[V3.1 schematic](https://resource.heltec.cn/download/WiFi_LoRa_32_V3/HTIT-WB32LA(F)_V3.1_Schematic_Diagram.pdf)
The schematic between V3.0 and V3.1 is virtually identical, with only two differences:
- V3.0 has a [FDG6322C](https://www.mouser.com/datasheet/2/308/1/FDG6322C_D-2312203.pdf) in the power supply circuitry. (FDG6322C is a dual N & P channel digital FET on the output of the LDO regulator. Seems like a cost cutting measure, but it might impact the maximum current or stability of the 3.3V rail.)
- V3.0 had different ESP32-S3 antenna filters:
- V3.0: L11 = 1.6nH, C15 = 6.9pF, C24 = 2.4pF
- V3.1: L11 = 1.8pF(?), C15 = 2.7nH (?), C24 = 1.8pF
Question marks above on V3.1 because pF are typically capacitors and nH are typically inductors.
## HELTEC v3
:::info
@ -99,22 +115,7 @@ Image Source: [Heltec](<https://resource.heltec.cn/download/WiFi_LoRa32_V3/HTIT-
<TabItem value="v3.1">
## HELTEC v3.1
On the top right side of the board where it normally says "V3" next to the U.FL/IPEX antenna connector, there is a "V3.1" instead of "V3". These started appearing around November 2023.
[V3.0 schematic](https://web.archive.org/web/20221127054612/https://resource.heltec.cn/download/WiFi_LoRa32_V3/HTIT-WB32LA(F)_V3_Schematic_Diagram.pdf)
[V3.1 schematic](https://resource.heltec.cn/download/WiFi_LoRa_32_V3/HTIT-WB32LA(F)_V3.1_Schematic_Diagram.pdf)
The schematic between V3.0 and V3.1 is virtually identical, with only two differences:
- V3.0 has a [FDG6322C](https://www.mouser.com/datasheet/2/308/1/FDG6322C_D-2312203.pdf) in the power supply circuitry. (FDG6322C is a dual N & P channel digital FET on the output of the LDO regulator. Seems like a cost cutting measure, but it might impact the maximum current or stability of the 3.3V rail.)
- V3.0 had different ESP32-S3 antenna filters:
- V3.0: L11 = 1.6nH, C15 = 6.9pF, C24 = 2.4pF
- V3.1: L11 = 1.8pF(?), C15 = 2.7nH (?), C24 = 1.8pF
Question marks above on V3.1 because pF are typically capacitors and nH are typically inductors.
</TabItem>