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feat(firmware): add Wi-Fi + TLS spike (Spike 6)

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Standalone `wifi_tls` binary: station assoc, SNTP, then a validated
HTTPS GET to api.github.com against the esp-idf cert bundle. Gates
Spike 7 (gitoxide push). Creds come from firmware/.env via build.rs.
This commit is contained in:
Julien Calixte
2026-07-05 09:22:31 +02:00
parent a1f58b7953
commit f8a4d53851
6 changed files with 278 additions and 6 deletions
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17
firmware/sdkconfig.defaults
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@@ -1,12 +1,21 @@
# Rust often needs a bit of an extra main task stack size compared to C (the default is 3K)
# You might have to increase this further if you allocate large stack variables in the main task
CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
# You might have to increase this further if you allocate large stack variables in the main task.
# Bumped for the TLS handshake (Spike 6): mbedtls runs on the calling task and
# wants several KB of stack on top of the app's own usage.
CONFIG_ESP_MAIN_TASK_STACK_SIZE=12288
# Increase a bit these stack sizes as they are also a bit too small by default
CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=4096
CONFIG_FREERTOS_IDLE_TASK_STACKSIZE=4096
# You might have to increase this further if you spawn your own Rust threads
# that allocate large stack variables; or better yet - use
# You might have to increase this further if you spawn your own Rust threads
# that allocate large stack variables; or better yet - use
# `std::thread::Builder::new().stack_size(XXX)` for spawning
CONFIG_PTHREAD_TASK_STACK_SIZE_DEFAULT=4096
# TLS trust store (Spike 6 — Wi-Fi + TLS, the gate for Spike 7 gitoxide push).
# The certificate bundle backs esp_crt_bundle_attach so an HTTPS GET to
# api.github.com validates against real roots. FULL rather than the common
# subset so a less common CA in the chain can't surprise us on the bench.
CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=y
CONFIG_MBEDTLS_CERTIFICATE_BUNDLE_DEFAULT_FULL=y