Fix RAK4631 hang when I2C WisBlock modules are present#2380
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benders wants to merge 1 commit intomeshcore-dev:devfrom
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Fix RAK4631 hang when I2C WisBlock modules are present#2380benders wants to merge 1 commit intomeshcore-dev:devfrom
benders wants to merge 1 commit intomeshcore-dev:devfrom
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WB_IO2 controls the 3V3_S switched peripheral rail on RAK base boards. gpsIsAwake() left the pin as INPUT on failure, dropping the rail and resetting the SSD1306 display. Centralize rail control via PIN_3V3_EN, restore it after GPS probing, re-init the display before UI start, and disable the rail on shutdown. Fixes meshcore-dev#1874 Refs meshcore-dev#2222 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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This change fixes a problem where the RAK4631 will hang on startup when I2C based WisBlock modules are present. These can be sensors or the RAK OLED display.
WB_IO2 controls the 3V3_S switched peripheral rail on RAK base boards. gpsIsAwake() left the pin as INPUT on failure, dropping the power rail. Then, when the I2C devices were probed, they couldn't respond and so the boot process hung. This fixes that by making the power rail code match that on the RAK3401, and making sure to restore it after GPS probing, re-init the display before UI start, and disable the 3V3_S rail on shutdown.
Fixes #1874
Refs #2222 and #2215